Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #1 based on HCP stacking sequence ABAB. Has the bonding topology of
	observed HT-C2/c pyroxenes.
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0002996
	7.3936910 6 3.4641016 90 117.9383 90 C2/c
	atom x y z
	Mg1 0 11/12 1/4
	Mg2 0 .25 1/4
	Si 5/16 1/12 19/48
	O1 1/8 1/12 5/24
	O2 3/8 .25 7/24
	O3 3/8 11/12 7/24
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #2 based on stacking sequence ABAC. Ideal analogue of protopyroxene,
	high-P protopyroxene.
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0002997
	6.5319726 6 3.4641016 90 90 90 *P2_1cn
	0 .25 0
	atom x y z
	Mg1 0 1/12 2/3
	Mg2 0 .25 1/6
	SiA 11/16 11/12 5/6
	SiB 5/16 1/12 0
	O1A 7/8 11/12 5/6
	O1B 1/8 1/12 0
	O2A 5/8 3/4 0
	O2B 3/8 .25 1/6
	O3A 5/8 11/12 1/2
	O3B 3/8 11/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #3a based on stacking sequence ABABCACABCBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0002998
	6.6332495 6 3.4641016 90 100.0250 90 P2/c
	atom x y z
	SiA 11/16 7/12 5/16
	SiB 13/16 11/12 1/48
	Mg1a 0 7/12 3/4
	Mg2a 0 .25 3/4
	Mg1b 1/2 1/12 3/4
	Mg2b 1/2 3/4 3/4
	O1A 7/8 7/12 3/8
	O2A 5/8 3/4 11/24
	O3A 5/8 5/12 11/24
	O1B 5/8 1/12 11/24
	O2B 7/8 .25 3/8
	O3B 7/8 11/12 3/8
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #3b based on stacking sequence ABABCACABCBC. Ideal analogue of low
	clinopyroxene.
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0002999
	6.9282032 6 3.4641016 90 109.4712 90 P2_1/c
	atom x y z
	SiA 1/16 1/3 3/8
	SiB 9/16 5/6 5/24
	Mg1 .25 2/3 1/6
	Mg2 .25 0 1/6
	O1A 7/8 1/3 1/4
	O1B 3/8 5/6 1/12
	O2A 1/8 1/2 1/4
	O2B 5/8 0 5/12
	O3A 1/8 1/3 3/4
	O3B 5/8 2/3 5/12
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #4 based on CCP stacking sequence ABCABCABCABC. Ideal analogue of HP-C2/c
	pyroxene and eight-coordinaSiEd Mg2-C2/c pyroxene.
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003000
	6.6332495 6.0 3.4641016 90 100.0250 90 C2/c
	atom x y z
	Si 5/16 1/12 3/16
	Mg1 0 11/12 1/4
	Mg2 0 .25 1/4
	O1 1/8 1/12 1/8
	O2 3/8 .25 3/8
	O3 3/8 1/12 7/8
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #5 based on stacking sequence ABABABAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003001
	13.063945 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 31/32 11/12 1/6
	SiB 29/32 5/12 0
	Mg1a 13/16 1/12 1/3
	Mg2a 13/16 3/4 1/3
	SiC 23/32 7/12 5/6
	SiD 21/32 11/12 1/2
	Mg1b 9/16 7/12 1/6
	Mg2b 9/16 .25 1/6
	SiE 13/32 7/12 1/2
	SiF 15/32 1/12 1/3
	Mg1c 5/16 1/12 2/3
	Mg2c 5/16 3/4 2/3
	SiG 5/32 1/12 0
	SiH 7/32 5/12 1/3
	Mg1d 1/16 5/12 2/3
	Mg2d 1/16 .25 1/6
	O1A 7/8 11/12 1/6
	O2A 0 3/4 0
	O3A 0 1/12 0
	O1B 0 5/12 0
	O2B 7/8 7/12 1/6
	O3B 7/8 3/4 2/3
	O1C 5/8 5/12 1/3
	O2C 3/4 3/4 0
	O3C 3/4 5/12 0
	O1D 3/4 1/12 0
	O2D 5/8 3/4 1/3
	O3D 5/8 1/12 1/3
	O1E 1/2 5/12 0
	O2E 3/8 3/4 1/3
	O3E 3/8 5/12 1/3
	O1F 3/8 1/12 1/3
	O2F 1/2 3/4 0
	O3F 1/2 1/12 0
	O1G .25 1/12 0
	O2G 1/8 3/4 1/3
	O3G 1/8 1/12 1/3
	O1H 1/8 5/12 1/3
	O2H .25 .25 1/2
	O3H .25 5/12 0
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #6 based on stacking sequence ABABACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003002
	13.063945 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 31/32 11/12 1/6
	SiB 29/32 5/12 0
	Mg1a 13/16 1/12 0
	Mg2a 13/16 3/4 0
	SiC 23/32 5/12 2/3
	SiD 21/32 1/12 1/3
	Mg1b 9/16 5/12 1/3
	Mg2b 9/16 3/4 1/3
	SiE 13/32 7/12 1/2
	SiF 15/32 1/12 1/3
	Mg1c 5/16 1/12 2/3
	Mg2c 5/16 3/4 2/3
	SiG 5/32 1/12 0
	SiH 7/32 5/12 1/3
	Mg1d 1/16 5/12 2/3
	Mg2d 1/16 .25 1/6
	O1A 7/8 11/12 1/6
	O2A 0 3/4 0
	O3A 0 1/12 0
	O1B 0 5/12 0
	O2B 7/8 7/12 1/6
	O3B 7/8 3/4 2/3
	O1C 5/8 5/12 2/3
	O2C 3/4 .25 5/6
	O3C 3/4 5/12 1/3
	O1D 3/4 1/12 1/3
	O2D 5/8 .25 1/6
	O3D 5/8 11/12 1/6
	O1E 1/2 5/12 0
	O2E 3/8 3/4 1/3
	O3E 3/8 5/12 1/3
	O1F 3/8 1/12 1/3
	O2F 1/2 3/4 0
	O3F 1/2 1/12 0
	O1G .25 1/12 0
	O2G 1/8 3/4 1/3
	O3G 1/8 1/12 1/3
	O1H 1/8 5/12 1/3
	O2H .25 .25 1/2
	O3H .25 5/12 0
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #7 based on stacking sequence ABABACAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003003
	13.063945 6 3.4641016 90 90 90 P2_1ca
	atom x y z
	SiA 31/32 11/12 11/12
	SiB 29/32 5/12 3/4
	Mg1a 5/16 1/12 5/12
	Mg2a 5/16 3/4 5/12
	SiC 5/32 1/12 3/4
	SiD 7/32 5/12 1/12
	Mg1b 1/16 5/12 5/12
	Mg2b 1/16 .25 11/12
	O1A 7/8 11/12 11/12
	O2A 0 3/4 3/4
	O3A 0 1/12 3/4
	O1B 0 5/12 3/4
	O2B 7/8 7/12 11/12
	O3B 7/8 3/4 5/12
	O1C .25 1/12 3/4
	O2C 1/8 3/4 1/12
	O3C 1/8 1/12 1/12
	O1D 1/8 5/12 1/12
	O2D .25 .25 1/4
	O3D .25 5/12 3/4
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #8a based on stacking sequence ABABCABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003004
	13.063945 6 3.4641016 90 90. 90 P2/c
	atom x y z
	SiA 29/32 11/12 1/12
	SiB 27/32 5/12 11/12
	SiC 13/32 11/12 3/4
	SiD 11/32 7/12 1/12
	Mg1a 0 5/12 1/4
	Mg2a 0 .25 3/4
	Mg1b .25 11/12 1/12
	Mg2b .25 .25 1/12
	Mg1c 1/2 7/12 3/4
	Mg2c 1/2 .25 3/4
	O1A 13/16 11/12 1/12
	O2A 15/16 3/4 11/12
	O3A 15/16 1/12 11/12
	O1B 15/16 5/12 11/12
	O2B 13/16 .25 1/12
	O3B 13/16 7/12 1/12
	O1C 5/16 11/12 3/4
	O2C 7/16 3/4 7/12
	O3C 7/16 11/12 1/12
	O1D 7/16 7/12 1/12
	O2D 5/16 3/4 1/4
	O3D 5/16 7/12 3/4
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #8b based on stacking sequence ABABCABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003005
	13.063945 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	SiA 31/32 1/6 1/3
	Mg1a 7/8 2/3 1/2
	Mg2a 7/8 0 1/2
	SiB 9/32 1/3 1/6
	SiC 7/32 2/3 1/2
	SiD 15/32 1/3 1/6
	Mg1b 3/8 2/3 1/6
	Mg2b 3/8 0 1/6
	O1A 1/16 1/6 1/3
	O2A 15/16 0 1/6
	O3A 15/16 1/3 1/6
	O1B 3/16 1/3 1/6
	O2B 5/16 1/2 0
	O3B 5/16 1/3 1/2
	O1C 5/16 2/3 1/2
	O2C 3/16 1/2 2/3
	O3C 3/16 2/3 1/6
	O1D 9/16 1/3 1/6
	O2D 7/16 1/2 1/3
	O3D 7/16 1/6 1/3
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #9a based on stacking sequence ABABCBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003006
	13.063948 6 3.4641016 90 90. 90 P2/c
	atom x y z
	SiA 29/32 11/12 1/12
	SiB 27/32 5/12 11/12
	SiC 13/32 11/12 3/4
	SiD 11/32 7/12 5/12
	Mg1a 0 5/12 1/4
	Mg2a 0 .25 3/4
	Mg1b .25 11/12 1/12
	Mg2b .25 .25 1/12
	Mg1c 1/2 7/12 3/4
	Mg2c 1/2 .25 3/4
	O1A 13/16 11/12 1/12
	O2A 15/16 3/4 11/12
	O3A 15/16 1/12 11/12
	O1B 15/16 5/12 11/12
	O2B 13/16 .25 1/12
	O3B 13/16 7/12 1/12
	O1C 5/16 11/12 3/4
	O2C 7/16 3/4 11/12
	O3C 7/16 1/12 11/12
	O1D 7/16 7/12 5/12
	O2D 5/16 3/4 1/4
	O3D 5/16 7/12 3/4
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #9b based on stacking sequence ABABCBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003007
	13.063945 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	SiA 31/32 1/6 1/3
	Mg1a 7/8 2/3 1/2
	Mg2a 7/8 0 1/2
	SiB 9/32 1/3 1/6
	SiC 7/32 2/3 1/2
	SiD 15/32 1/6 1/3
	Mg1b 3/8 2/3 5/6
	Mg2b 3/8 0 5/6
	O1A 1/16 1/6 1/3
	O2A 15/16 0 1/6
	O3A 15/16 1/3 1/6
	O1B 3/16 1/3 1/6
	O2B 5/16 1/2 0
	O3B 5/16 1/3 1/2
	O1C 5/16 2/3 1/2
	O2C 3/16 1/2 2/3
	O3C 3/16 2/3 1/6
	O1D 9/16 1/6 1/3
	O2D 7/16 0 1/6
	O3D 7/16 1/3 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #10 based on stacking sequence ABACBABC. Ideal analogue to orthopyroxene.
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003008
	13.063945 6 3.4641016 90 90 90 *P2_1ca
	0 .25 0
	atom x y z
	SiA 9/32 1/6 7/12
	SiB 7/32 2/3 5/12
	Mg1a 1/8 1/3 5/12
	Mg2a 1/8 0 5/12
	SiC 15/32 1/6 1/4
	SiD 17/32 5/6 7/12
	Mg1b 7/8 2/3 3/4
	Mg2b 7/8 1/2 1/4
	O1A 3/16 1/6 7/12
	O2A 5/16 0 5/12
	O3A 5/16 1/3 5/12
	O1B 5/16 2/3 5/12
	O2B 3/16 1/2 7/12
	O3B 3/16 5/6 7/12
	O1C 9/16 1/6 1/4
	O2C 7/16 0 1/12
	O3C 7/16 1/6 7/12
	O1D 7/16 5/6 7/12
	O2D 9/16 0 3/4
	O3D 9/16 5/6 1/4
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #11a based on stacking sequence ABABABABCABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003009
	19.595917 6 3.4641016 90 90. 90 P2/c
	atom x y z
	SiA 1/16 7/12 5/12
	SiB 5/48 1/12 7/12
	SiC 11/48 1/12 11/12
	SiD 13/48 5/12 7/12
	SiE 19/48 5/12 7/12
	SiF 7/16 1/12 1/4
	Mg1a 0 1/12 1/4
	Mg2a 0 .25 3/4
	Mg1b 1/6 5/12 1/4
	Mg2b 1/6 .25 3/4
	Mg1c 1/3 1/12 7/12
	Mg2c 1/3 .25 1/12
	Mg1d 1/2 5/12 1/4
	Mg2d 1/2 .25 3/4
	O1A 1/8 7/12 5/12
	O2A 1/24 3/4 7/12
	O3A 1/24 5/12 7/12
	O1B 1/24 1/12 7/12
	O2B 1/8 .25 5/12
	O3B 1/8 1/12 11/12
	O1C 7/24 1/12 11/12
	O2C 5/24 .25 1/12
	O3C 5/24 1/12 7/12
	O1D 5/24 5/12 7/12
	O2D 7/24 .25 5/12
	O3D 7/24 7/12 5/12
	O1E 11/24 5/12 7/12
	O2E 3/8 .25 3/4
	O3E 3/8 7/12 3/4
	O1F 3/8 1/12 1/4
	O2F 11/24 .25 1/12
	O3F 11/24 1/12 7/12
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #11b based on stacking sequence ABABABABCABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003010
	19.595917 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	Mg1a 1/12 2/3 1/2
	Mg2a 1/12 1/2 0
	Mg1b .25 1/3 1/2
	Mg2b .25 1/2 0
	Mg1c 5/12 5/6 2/3
	Mg2c 5/12 1/2 2/3
	SiA 7/48 1/6 1/3
	SiB 3/16 5/6 2/3
	SiC 5/16 2/3 1/2
	SiD 17/48 1/3 1/6
	SiE 23/48 1/6 2/3
	SiF 1/48 1/6 2/3
	O1A 5/24 1/6 1/3
	O2A 1/8 0 1/6
	O3A 1/8 1/6 2/3
	O1B 1/8 5/6 2/3
	O2B 5/24 0 5/6
	O3B 5/24 5/6 1/3
	O1C 3/8 2/3 1/2
	O2C 7/24 1/2 2/3
	O3C 7/24 5/6 2/3
	O1D 7/24 1/3 1/6
	O2D 3/8 1/2 0
	O3D 3/8 1/6 0
	O1E 13/24 1/6 2/3
	O2E 11/24 0 5/6
	O3E 11/24 1/6 1/3
	O1F 23/24 1/6 2/3
	O2F 1/24 0 5/6
	O3F 1/24 1/6 1/3
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #12a based on stacking sequence ABABABABCBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003011
	19.595917 6 3.4641016 90 90. 90 P2/c
	atom x y z
	SiA 1/16 7/12 5/12
	SiB 5/48 1/12 7/12
	SiC 11/48 1/12 11/12
	SiD 13/48 5/12 7/12
	SiE 19/48 7/12 5/12
	SiF 7/16 1/12 1/4
	Mg1a 0 1/12 1/4
	Mg2a 0 .25 3/4
	Mg1b 1/6 5/12 1/4
	Mg2b 1/6 .25 3/4
	Mg1c 1/3 1/12 7/12
	Mg2c 1/3 .25 1/12
	Mg1d 1/2 5/12 1/4
	Mg2d 1/2 .25 3/4
	O1A 1/8 7/12 5/12
	O2A 1/24 3/4 7/12
	O3A 1/24 5/12 7/12
	O1B 1/24 1/12 7/12
	O2B 1/8 .25 5/12
	O3B 1/8 1/12 11/12
	O1C 7/24 1/12 11/12
	O2C 5/24 .25 1/12
	O3C 5/24 1/12 7/12
	O1D 5/24 5/12 7/12
	O2D 7/24 .25 5/12
	O3D 7/24 7/12 5/12
	O1E 11/24 7/12 5/12
	O2E 3/8 .25 3/4
	O3E 3/8 7/12 3/4
	O1F 3/8 1/12 1/4
	O2F 11/24 .25 5/12
	O3F 11/24 11/12 5/12
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #12b based on stacking sequence ABABABABCBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003012
	19.595917 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	Mg1a 1/12 2/3 1/2
	Mg2a 1/12 1/2 0
	Mg1b .25 1/3 1/2
	Mg2b .25 1/2 0
	Mg1c 5/12 2/3 5/6
	Mg2c 5/12 1/2 1/3
	SiA 7/48 1/6 1/3
	SiB 3/16 5/6 2/3
	SiC 5/16 2/3 1/2
	SiD 17/48 1/3 1/6
	SiE 23/48 1/6 1/3
	SiF 1/48 1/6 2/3
	O1A 5/24 1/6 1/3
	O2A 1/8 0 1/6
	O3A 1/8 1/6 2/3
	O1B 1/8 5/6 2/3
	O2B 5/24 0 5/6
	O3B 5/24 5/6 1/3
	O1C 3/8 2/3 1/2
	O2C 7/24 1/2 2/3
	O3C 7/24 5/6 2/3
	O1D 7/24 1/3 1/6
	O2D 3/8 1/2 0
	O3D 3/8 1/6 0
	O1E 13/24 1/6 1/3
	O2E 11/24 0 1/6
	O3E 11/24 1/6 2/3
	O1F 23/24 1/6 2/3
	O2F 1/24 0 5/6
	O3F 1/24 1/6 1/3
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #13 based on stacking sequence ABABABACACAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003013
	19.595917 6 3.4641016 90 90 90 P2_1cn
	atom x y z
	SiA 1/48 2/3 1/3
	SiB 1/16 1/3 0
	SiC 3/16 1/6 5/6
	SiD 11/48 2/3 0
	SiE 17/48 2/3 1/3
	SiF 19/48 1/3 0
	Mg1a 1/8 2/3 2/3
	Mg2a 1/8 0 2/3
	Mg1b 7/24 1/3 2/3
	Mg2b 7/24 0 2/3
	Mg1c 11/24 2/3 2/3
	Mg2c 11/24 0 2/3
	O1A 1/12 2/3 1/3
	O2A 0 1/2 1/2
	O3A 0 5/6 1/2
	O1B 0 1/3 0
	O2B 1/12 0 1/3
	O3B 1/12 1/3 1/3
	O1C .25 1/6 5/6
	O2C 1/6 0 0
	O3C 1/6 1/3 0
	O1D 1/6 2/3 0
	O2D .25 0 1/3
	O3D .25 2/3 1/3
	O1E 5/12 2/3 1/3
	O2E 1/3 0 0
	O3E 1/3 2/3 0
	O1F 1/3 1/3 0
	O2F 5/12 0 1/3
	O3F 5/12 1/3 1/3
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #14a based on stacking sequence ABABABCABABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003014
	19.595917 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	SiA 7/48 5/6 2/3
	SiB 3/16 1/6 1/3
	SiC 5/16 1/6 1/3
	SiD 17/48 5/6 0
	SiE 25/48 1/3 1/6
	SiF 1/48 5/6 1/3
	Mg1a 1/12 1/6 0
	Mg2a 1/12 0 1/2
	Mg1b .25 2/3 5/6
	Mg2b .25 1/2 1/3
	Mg1c 5/12 1/6 0
	Mg2c 5/12 0 1/2
	O1A 5/24 5/6 2/3
	O2A 1/8 0 5/6
	O3A 1/8 5/6 1/3
	O1B 1/8 1/6 1/3
	O2B 5/24 0 1/6
	O3B 5/24 1/6 2/3
	O1C 3/8 1/6 1/3
	O2C 7/24 0 1/2
	O3C 7/24 1/6 0
	O1D 7/24 5/6 0
	O2D 3/8 0 5/6
	O3D 3/8 5/6 1/3
	O1E 11/24 1/3 1/6
	O2E 13/24 0 5/6
	O3E 13/24 1/6 1/3
	O1F 23/24 5/6 1/3
	O2F 1/24 0 1/6
	O3F 1/24 5/6 2/3
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #14b based on stacking sequence ABABABCABABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003015
	19.595917 6 3.4641016 90 90. 90 P2/c
	atom x y z
	SiA 1/16 7/12 1/12
	SiB 5/48 1/12 11/12
	SiC 11/48 1/12 1/4
	SiD 13/48 7/12 5/12
	SiE 19/48 7/12 5/12
	SiF 7/16 1/12 7/12
	Mg1a 0 1/12 1/4
	Mg2a 0 .25 3/4
	Mg1b 1/6 5/12 1/4
	Mg2b 1/6 .25 3/4
	Mg1c 1/3 1/12 11/12
	Mg2c 1/3 .25 5/12
	Mg1d 1/2 5/12 1/4
	Mg2d 1/2 .25 3/4
	O1A 1/8 7/12 1/12
	O2A 1/24 .25 5/12
	O3A 1/24 7/12 5/12
	O1B 1/24 1/12 11/12
	O2B 1/8 .25 1/12
	O3B 1/8 1/12 7/12
	O1C 7/24 1/12 1/4
	O2C 5/24 .25 5/12
	O3C 5/24 1/12 11/12
	O1D 5/24 7/12 5/12
	O2D 7/24 3/4 1/4
	O3D 7/24 5/12 1/4
	O1E 11/24 7/12 5/12
	O2E 3/8 .25 1/12
	O3E 3/8 7/12 1/12
	O1F 3/8 1/12 7/12
	O2F 11/24 .25 5/12
	O3F 11/24 1/12 11/12
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #15a based on stacking sequence ABABABCBABAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003016
	19.595917 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	SiA 1/48 5/6 1/3
	Mg1a 1/12 1/6 0
	Mg2a 1/12 0 1/2
	SiB 7/48 2/3 1/6
	SiC 3/16 1/6 1/3
	Mg1b .25 2/3 5/6
	Mg2b .25 0 5/6
	SiD 5/16 1/3 1/6
	SiE 17/48 5/6 0
	Mg1c 5/12 1/6 0
	Mg2c 5/12 0 1/2
	SiF 23/48 2/3 1/6
	O1A 23/24 5/6 1/3
	O2A 1/24 0 1/6
	O3A 1/24 5/6 2/3
	O1B 5/24 2/3 1/6
	O2B 1/8 0 5/6
	O3B 1/8 5/6 1/3
	O1C 1/8 1/6 1/3
	O2C 5/24 0 1/6
	O3C 5/24 1/3 1/6
	O1D 3/8 1/3 1/6
	O2D 7/24 0 1/2
	O3D 7/24 1/6 0
	O1E 7/24 5/6 0
	O2E 3/8 0 1/6
	O3E 3/8 2/3 1/6
	O1F 13/24 2/3 1/6
	O2F 11/24 0 5/6
	O3F 11/24 5/6 1/3
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #15b based on stacking sequence ABABABCBABAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003017
	19.595917 6 3.4641016 90 90. 90 P2/c
	atom x y z
	SiA 1/16 7/12 1/12
	SiB 5/48 1/12 11/12
	Mg1a 1/6 5/12 1/4
	Mg2a 1/6 .25 3/4
	SiC 11/48 1/12 1/4
	SiD 13/48 7/12 5/12
	Mg1b 1/3 1/12 7/12
	Mg2b 1/3 .25 1/12
	SiE 19/48 7/12 1/12
	SiF 7/16 1/12 11/12
	Mg1c 1/2 5/12 1/4
	Mg2c 1/2 .25 3/4
	Mg1d 0 1/12 1/4
	Mg2d 0 .25 3/4
	O1A 1/8 7/12 1/12
	O2A 1/24 .25 5/12
	O3A 1/24 7/12 5/12
	O1B 1/24 1/12 11/12
	O2B 1/8 .25 1/12
	O3B 1/8 1/12 7/12
	O1C 7/24 1/12 1/4
	O2C 5/24 .25 5/12
	O3C 5/24 1/12 11/12
	O1D 5/24 7/12 5/12
	O2D 7/24 .25 3/4
	O3D 7/24 5/12 1/4
	O1E 11/24 7/12 1/12
	O2E 3/8 .25 5/12
	O3E 3/8 7/12 5/12
	O1F 3/8 1/12 11/12
	O2F 11/24 .25 1/12
	O3F 11/24 1/12 7/12
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #16 based on stacking sequence ABABACABABAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003018
	19.899748 6 3.4641016 90 100.024987862 90 Cc
	atom x y z
	SiA 1/48 5/12 17/48
	SiB 1/16 1/12 1/16
	Mg1a 1/8 5/12 19/24
	Mg2a 1/8 .25 7/24
	SiC 3/16 1/12 25/48
	SiD 11/48 5/12 11/48
	Mg1b 7/24 1/12 23/24
	Mg2b 7/24 .25 11/24
	SiE 17/48 7/12 25/48
	SiF 19/48 1/12 19/48
	Mg1c 11/24 5/12 19/24
	Mg2c 11/24 .25 7/24
	O1A 1/12 5/12 5/12
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 11/12
	O3B 1/12 1/12 5/12
	O1C .25 1/12 7/12
	O2C 1/6 .25 2/3
	O3C 1/6 1/12 1/6
	O1D 1/6 5/12 1/6
	O2D .25 3/4 7/12
	O3D .25 5/12 7/12
	O1E 5/12 7/12 7/12
	O2E 1/3 3/4 1/3
	O3E 1/3 5/12 1/3
	O1F 1/3 1/12 1/3
	O2F 5/12 .25 7/12
	O3F 5/12 1/12 1/12
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #17a based on stacking sequence ABABACACBCBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003019
	19.595917 6 3.4641016 90 90. 90 P2/c
	atom x y z
	Mg1a 0 5/12 1/4
	Mg2a 0 .25 3/4
	SiA 1/16 1/12 7/12
	SiB 5/48 7/12 5/12
	Mg1b 1/6 1/12 11/12
	Mg2b 1/6 .25 5/12
	SiC 11/48 7/12 1/12
	SiD 13/48 1/12 1/4
	Mg1c 1/3 5/12 11/12
	Mg2c 1/3 .25 5/12
	SiE 19/48 1/12 7/12
	SiF 7/16 5/12 1/4
	Mg1d 1/2 1/12 1/4
	Mg2d 1/2 .25 3/4
	O1A 1/8 1/12 7/12
	O2A 1/24 .25 5/12
	O3A 1/24 1/12 11/12
	O1B 1/24 7/12 5/12
	O2B 1/8 .25 1/12
	O3B 1/8 7/12 1/12
	O1C 7/24 7/12 1/12
	O2C 5/24 3/4 1/4
	O3C 5/24 5/12 1/4
	O1D 5/24 1/12 1/4
	O2D 7/24 .25 1/12
	O3D 7/24 1/12 7/12
	O1E 11/24 1/12 7/12
	O2E 3/8 .25 3/4
	O3E 3/8 1/12 1/4
	O1F 3/8 5/12 1/4
	O2F 11/24 .25 1/12
	O3F 11/24 7/12 1/12
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #17b based on stacking sequence ABABACACBCBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003020
	19.595917 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	SiA 1/48 2/3 1/3
	Mg1a 1/12 1/6 1/2
	Mg2a 1/12 0 0
	SiB 7/48 2/3 0
	SiC 3/16 1/3 1/3
	Mg1b .25 2/3 2/3
	Mg2b .25 0 2/3
	SiD 5/16 1/3 0
	SiE 17/48 2/3 1/3
	Mg1c 5/12 1/6 1/6
	Mg2c 5/12 0 2/3
	SiF 23/48 5/6 1/6
	O1A 23/24 2/3 1/3
	O2A 1/24 0 2/3
	O3A 1/24 2/3 2/3
	O1B 5/24 2/3 0
	O2B 1/8 0 1/3
	O3B 1/8 2/3 1/3
	O1C 1/8 1/3 1/3
	O2C 5/24 0 0
	O3C 5/24 1/3 0
	O1D 3/8 1/3 0
	O2D 7/24 0 1/3
	O3D 7/24 1/3 1/3
	O1E 7/24 2/3 1/3
	O2E 3/8 0 0
	O3E 3/8 2/3 0
	O1F 13/24 5/6 1/6
	O2F 11/24 0 1/3
	O3F 11/24 2/3 1/3
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #18 based on stacking sequence ABABACBABABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003021
	19.595917 6 3.4641016 90 90 90 P2_1cn
	atom x y z
	SiA 1/16 1/6 1/3
	SiB 1/48 2/3 1/6
	Mg1a 1/8 2/3 1/2
	Mg2a 1/8 0 1/2
	SiC 3/16 1/3 1/6
	SiD 11/48 5/6 1/3
	Mg1b 7/24 1/6 0
	Mg2b 7/24 0 1/2
	SiE 17/48 5/6 0
	SiF 19/48 1/6 1/3
	Mg1c 11/24 2/3 5/6
	Mg2c 11/24 0 5/6
	O1A 0 1/6 1/3
	O2A 1/12 0 1/6
	O3A 1/12 1/3 1/6
	O1B 1/12 2/3 1/6
	O2B 0 0 5/6
	O3B 0 2/3 5/6
	O1C .25 1/3 1/6
	O2C 1/6 1/2 1/3
	O3C 1/6 1/6 1/3
	O1D 1/6 5/6 1/3
	O2D .25 0 1/6
	O3D .25 2/3 1/6
	O1E 5/12 5/6 0
	O2E 1/3 0 5/6
	O3E 1/3 2/3 5/6
	O1F 1/3 1/6 1/3
	O2F 5/12 0 1/2
	O3F 5/12 1/6 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #19a based on stacking sequence ABABCABCBCAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003022
	19.595917 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	SiA 1/48 1/3 1/3
	Mg1a 1/12 2/3 1/3
	Mg2a 1/12 1/2 5/6
	SiB 7/48 1/3 1/3
	SiC 3/16 2/3 0
	Mg1b .25 1/6 1/6
	Mg2b .25 0 2/3
	SiD 5/16 2/3 1/3
	SiE 17/48 1/3 0
	Mg1c 5/12 2/3 0
	Mg2c 5/12 0 0
	SiF 23/48 1/3 1/3
	O1A 23/24 1/3 1/3
	O2A 1/24 0 2/3
	O3A 1/24 1/3 2/3
	O1B 5/24 1/3 1/3
	O2B 1/8 0 0
	O3B 1/8 1/6 1/2
	O1C 1/8 2/3 0
	O2C 5/24 0 1/3
	O3C 5/24 2/3 1/3
	O1D 3/8 2/3 1/3
	O2D 7/24 0 0
	O3D 7/24 2/3 0
	O1E 7/24 1/3 0
	O2E 3/8 0 1/3
	O3E 3/8 1/3 1/3
	O1F 13/24 1/3 1/3
	O2F 11/24 0 2/3
	O3F 11/24 1/3 2/3
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #19b based on stacking sequence ABABCABCBCAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003023
	19.595917 6 3.4641016 90 90. 90 P2/c
	atom x y z
	Mg1a 0 5/12 1/4
	Mg2a 0 .25 3/4
	SiA 1/16 1/12 1/4
	SiB 5/48 5/12 11/12
	Mg1b 1/6 1/12 11/12
	Mg2b 1/6 .25 5/12
	SiC 11/48 5/12 1/4
	SiD 13/48 1/12 7/12
	Mg1c 1/3 5/12 11/12
	Mg2c 1/3 .25 5/12
	SiE 19/48 1/12 11/12
	SiF 7/16 7/12 1/12
	Mg1d 1/2 1/12 1/4
	Mg2d 1/2 .25 3/4
	O1A 1/8 1/12 1/4
	O2A 1/24 .25 5/12
	O3A 1/24 1/12 11/12
	O1B 1/24 7/12 5/12
	O2B 1/8 3/4 1/4
	O3B 1/8 7/12 3/4
	O1C 7/24 5/12 1/4
	O2C 5/24 .25 1/12
	O3C 5/24 7/12 1/12
	O1D 5/24 1/12 7/12
	O2D 7/24 .25 3/4
	O3D 7/24 1/12 1/4
	O1E 11/24 1/12 11/12
	O2E 3/8 .25 1/12
	O3E 3/8 1/12 7/12
	O1F 3/8 7/12 1/12
	O2F 11/24 .25 5/12
	O3F 11/24 7/12 5/12
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #20a based on stacking sequence ABABCACBACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003024
	19.595917 6 3.4641016 90 90. 90 P2/c
	atom x y z
	Mg1a 0 5/12 1/4
	Mg2a 0 .25 3/4
	SiA 1/16 1/12 11/12
	SiB 5/48 7/12 1/12
	Mg1b 1/6 1/12 7/12
	Mg2b 1/6 .25 1/12
	SiC 11/48 7/12 1/12
	SiD 13/48 1/12 1/4
	Mg1c 1/3 5/12 11/12
	Mg2c 1/3 .25 5/12
	SiE 7/16 5/12 1/4
	SiF 19/48 1/12 11/12
	Mg1d 1/2 1/12 1/4
	Mg2d 1/2 .25 3/4
	O1A 1/8 1/12 11/12
	O2A 1/24 .25 1/12
	O3A 1/24 1/12 7/12
	O1B 1/24 7/12 1/12
	O2B 1/8 .25 5/12
	O3B 1/8 7/12 5/12
	O1C 7/24 7/12 1/12
	O2C 5/24 3/4 1/4
	O3C 5/24 5/12 1/4
	O1D 5/24 1/12 1/4
	O2D 7/24 .25 1/12
	O3D 7/24 1/12 7/12
	O1E 5/8 5/12 1/4
	O2E 13/24 .25 1/12
	O3E 13/24 7/12 1/12
	O1F 13/24 1/12 7/12
	O2F 5/8 .25 3/4
	O3F 5/8 1/12 1/4
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #20b based on stacking sequence ABABCACBACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003025
	19.595917 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	SiA 1/48 2/3 1/6
	Mg1a 1/12 1/6 0
	Mg2a 1/12 0 1/2
	SiB 7/48 5/6 0
	SiC 3/16 1/3 1/6
	Mg1b .25 2/3 1/6
	Mg2b .25 0 1/6
	SiD 5/16 1/6 0
	SiE 17/48 5/6 1/3
	Mg1c 5/12 1/6 1/3
	Mg2c 5/12 0 5/6
	SiF 23/48 5/6 1/3
	O1A 23/24 2/3 1/6
	O2A 1/24 0 5/6
	O3A 1/24 5/6 1/3
	O1B 5/24 5/6 0
	O2B 1/8 0 1/6
	O3B 1/8 2/3 1/6
	O1C 1/8 1/3 1/6
	O2C 5/24 1/2 0
	O3C 5/24 1/6 0
	O1D 3/8 1/6 0
	O2D 7/24 0 5/6
	O3D 7/24 1/6 1/3
	O1E 7/24 5/6 1/3
	O2E 3/8 1/2 0
	O3E 3/8 5/6 0
	O1F 13/24 5/6 1/3
	O2F 11/24 0 1/6
	O3F 11/24 2/3 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #21a based on stacking sequence ABABCACBCBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003026
	19.595917 6 3.4641016 90 90 90 P2_1cn
	atom x y z
	SiA 1/48 2/3 0
	SiB 1/16 1/6 1/6
	Mg1a 1/8 2/3 1/3
	Mg2a 1/8 0 1/3
	SiC 3/16 1/3 0
	SiD 11/48 5/6 1/6
	Mg1b 7/24 1/6 1/6
	Mg2b 7/24 0 2/3
	SiE 17/48 5/6 1/6
	SiF 19/48 1/3 1/3
	Mg1c 11/24 2/3 0
	Mg2c 11/24 0 0
	O1A 1/12 2/3 0
	O2A 0 0 2/3
	O3A 0 2/3 2/3
	O1B 0 1/6 1/6
	O2B 1/12 0 0
	O3B 1/12 1/3 0
	O1C .25 1/3 0
	O2C 1/6 0 2/3
	O3C 1/6 1/3 2/3
	O1D 1/6 5/6 1/6
	O2D .25 0 0
	O3D .25 2/3 0
	O1E 5/12 5/6 1/6
	O2E 1/3 0 1/3
	O3E 1/3 2/3 1/3
	O1F 1/3 1/3 1/3
	O2F 5/12 0 2/3
	O3F 5/12 1/6 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #21b based on stacking sequence ABABCACBCBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003027
	19.595917 6 3.4641016 90 90 90 P2_1cn
	atom x y z
	Mg1a 1/24 2/3 1/3
	Mg2a 1/24 1/2 5/6
	SiA 5/48 1/6 1/6
	SiB 7/48 2/3 0
	Mg1b 5/24 1/6 5/6
	Mg2b 5/24 0 1/3
	SiC 13/48 2/3 1/3
	SiD 5/16 1/3 0
	Mg1c 3/8 2/3 0
	Mg2c 3/8 0 0
	SiE 7/16 1/3 1/3
	SiF 23/48 5/6 1/6
	O1A 1/6 1/6 1/6
	O2A 1/12 0 0
	O3A 1/12 1/3 0
	O1B 1/12 2/3 0
	O2B 1/6 0 2/3
	O3B 1/6 2/3 2/3
	O1C 1/3 2/3 1/3
	O2C .25 0 0
	O3C .25 2/3 0
	O1D .25 1/3 0
	O2D 1/3 0 1/3
	O3D 1/3 1/3 1/3
	O1E 1/2 1/3 1/3
	O2E 5/12 0 2/3
	O3E 5/12 1/3 2/3
	O1F 5/12 5/6 1/6
	O2F 1/2 0 1/3
	O3F 1/2 2/3 1/3
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #22a based on stacking sequence ABACBACBACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003028
	19.595917 6 3.4641016 90 90. 90 P2/c
	atom x y z
	Mg1a 0 5/12 1/4
	Mg2a 0 .25 3/4
	SiA 1/16 1/12 1/4
	SiB 5/48 7/12 1/12
	Mg1b 1/6 1/12 7/12
	Mg2b 1/6 .25 1/12
	SiC 11/48 7/12 1/12
	SiD 13/48 1/12 11/12
	Mg1c 1/3 5/12 11/12
	Mg2c 1/3 .25 5/12
	SiE 19/48 1/12 7/12
	SiF 7/16 5/12 1/4
	Mg1d 1/2 1/12 1/4
	Mg2d 1/2 .25 3/4
	O1A 1/8 1/12 1/4
	O2A 1/24 .25 1/12
	O3A 1/24 1/12 7/12
	O1B 1/24 7/12 1/12
	O2B 1/8 3/4 1/4
	O3B 1/8 5/12 1/4
	O1C 7/24 7/12 1/12
	O2C 5/24 .25 5/12
	O3C 5/24 7/12 5/12
	O1D 5/24 1/12 11/12
	O2D 7/24 .25 1/12
	O3D 7/24 1/12 7/12
	O1E 11/24 1/12 7/12
	O2E 3/8 .25 3/4
	O3E 3/8 1/12 1/4
	O1F 3/8 5/12 1/4
	O2F 11/24 .25 1/12
	O3F 11/24 7/12 1/12
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #22b based on stacking sequence ABACBACBACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003029
	19.595917 6 3.4641016 90 90. 90 P2_1/c
	atom x y z
	SiA 1/48 5/6 1/6
	Mg1a 1/12 1/6 1/6
	Mg2a 1/12 0 2/3
	SiB 7/48 5/6 1/6
	SiC 3/16 1/3 0
	Mg1b .25 2/3 0
	Mg2b .25 0 0
	SiD 5/16 1/3 0
	SiE 17/48 2/3 1/3
	Mg1c 5/12 1/6 1/6
	Mg2c 5/12 0 2/3
	SiF 23/48 2/3 2/3
	O1A 23/24 5/6 1/6
	O2A 1/24 0 1/3
	O3A 1/24 2/3 1/3
	O1B 5/24 5/6 1/6
	O2B 1/8 0 0
	O3B 1/8 2/3 0
	O1C 1/8 1/3 0
	O2C 5/24 0 2/3
	O3C 5/24 1/6 1/6
	O1D 3/8 1/3 0
	O2D 7/24 0 1/3
	O3D 7/24 1/3 1/3
	O1E 7/24 2/3 1/3
	O2E 3/8 0 0
	O3E 3/8 2/3 0
	O1F 13/24 2/3 2/3
	O2F 11/24 0 1/3
	O3F 11/24 2/3 1/3
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #23 based on stacking sequence ABACBACBCABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003030
	19.595917 6 3.4641016 90 90 90 P2_1cn
	atom x y z
	SiA 1/48 2/3 0
	SiB 1/16 1/6 1/6
	Mg1a 1/8 2/3 1/3
	Mg2a 1/8 0 1/3
	SiC 3/16 1/3 1/3
	SiD 11/48 5/6 1/6
	Mg1b 7/24 1/6 1/6
	Mg2b 7/24 0 2/3
	SiE 17/48 5/6 1/6
	SiF 19/48 1/3 0
	Mg1c 11/24 2/3 0
	Mg2c 11/24 0 0
	O1A 1/12 2/3 0
	O2A 0 0 2/3
	O3A 0 2/3 2/3
	O1B 0 1/6 1/6
	O2B 1/12 0 0
	O3B 1/12 1/3 0
	O1C .25 1/3 1/3
	O2C 1/6 0 2/3
	O3C 1/6 1/3 2/3
	O1D 1/6 5/6 1/6
	O2D .25 0 1/3
	O3D .25 2/3 1/3
	O1E 5/12 5/6 1/6
	O2E 1/3 0 0
	O3E 1/3 2/3 0
	O1F 1/3 1/3 0
	O2F 5/12 0 2/3
	O3F 5/12 1/6 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #24 based on stacking sequence ABACBCABACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003031
	19.899748 6 3.4641016 90 100.024987862 90 C2/c
	atom x y z
	Mg1a 0 5/12 3/4
	Mg2a 0 .25 1/4
	SiA 1/16 1/12 13/16
	SiB 5/48 5/12 25/48
	Mg1b 1/6 1/12 1/4
	Mg2b 1/6 .25 3/4
	SiC 11/48 5/12 5/16
	O1A 1/8 1/12 7/8
	O2A 1/24 .25 23/24
	O3A 1/24 1/12 11/24
	O1B 1/24 5/12 11/24
	O2B 1/8 .25 3/8
	O3B 1/8 7/12 3/8
	O1C 7/24 5/12 3/8
	O2C 5/24 3/4 5/8
	O3C 5/24 5/12 5/8
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #25 based on stacking sequence ABABABABABAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003032
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 7/12 1/6
	Mg2c 11/24 .25 1/6
	SiG 25/48 11/12 5/6
	SiH 9/16 7/12 1/2
	Mg1d 5/8 11/12 1/6
	Mg2d 5/8 .25 1/6
	SiJ 11/16 7/12 5/6
	SiK 35/48 11/12 1/2
	Mg1e 19/24 7/12 1/6
	Mg2e 19/24 .25 1/6
	SiL 41/48 11/12 1/6
	SiM 43/48 7/12 1/2
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 1/3
	O2J 2/3 .25 1/2
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 5/6
	O3K 3/4 1/12 1/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #26 based on stacking sequence ABABABABACAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003033
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 7/12 1/6
	Mg2c 11/24 .25 1/6
	SiG 25/48 11/12 5/6
	SiH 9/16 7/12 1/2
	Mg1d 5/8 11/12 1/6
	Mg2d 5/8 .25 1/6
	SiJ 11/16 7/12 1/6
	SiK 35/48 11/12 1/2
	Mg1e 19/24 7/12 5/6
	Mg2e 19/24 .25 5/6
	SiL 41/48 11/12 1/6
	SiM 43/48 7/12 1/2
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 2/3
	O2J 2/3 .25 1/2
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #27 based on stacking sequence ABABABABACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003034
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 7/12 1/6
	Mg2c 11/24 .25 1/6
	SiG 25/48 11/12 5/6
	SiH 9/16 7/12 1/2
	Mg1d 5/8 11/12 1/6
	Mg2d 5/8 .25 1/6
	SiJ 11/16 7/12 1/6
	SiK 35/48 11/12 1/2
	Mg1e 19/24 7/12 1/2
	Mg2e 19/24 .25 1/2
	SiL 41/48 11/12 1/6
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 2/3
	O2J 2/3 .25 1/2
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #28 based on stacking sequence ABABABACABAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003035
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 7/12 1/6
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 0
	Mg1d 5/8 1/12 1/3
	Mg2d 5/8 .25 5/6
	SiJ 11/16 7/12 5/6
	SiK 35/48 11/12 1/2
	Mg1e 19/24 7/12 1/6
	Mg2e 19/24 .25 1/6
	SiL 41/48 11/12 1/6
	SiM 43/48 7/12 1/2
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 5/12 1/3
	O2J 2/3 .25 1/2
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 5/6
	O3K 3/4 1/12 1/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #29a based on stacking sequence ABABABACACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003036
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 7/12 1/6
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 0
	Mg1d 5/8 1/12 1/3
	Mg2d 5/8 .25 5/6
	SiJ 11/16 7/12 1/6
	SiK 35/48 11/12 1/2
	Mg1e 19/24 7/12 1/2
	Mg2e 19/24 .25 1/2
	SiL 41/48 11/12 1/6
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 5/12 2/3
	O2J 2/3 .25 1/2
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #29b based on stacking sequence ABABABACACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003037
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/2
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 2/3
	Mg2c 3/8 .25 1/6
	SiE 7/16 11/12 1/2
	SiF 23/48 5/12 1/3
	Mg1d 13/24 1/12 1/3
	Mg2d 13/24 .25 5/6
	SiG 29/48 7/12 1/2
	SiH 31/48 11/12 1/6
	Mg1e 17/24 5/12 1/3
	Mg2e 17/24 .25 5/6
	SiJ 37/48 11/12 5/6
	SiK 13/16 7/12 1/6
	Mg1f 7/8 1/12 0
	Mg2f 7/8 .25 1/2
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 5/12 0
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/2
	O3D 1/3 1/12 0
	O1E 1/2 1/12 0
	O2E 5/12 .25 5/6
	O3E 5/12 1/12 1/3
	O1F 5/12 5/12 1/3
	O2F 1/2 .25 1/2
	O3F 1/2 5/12 0
	O1G 2/3 5/12 0
	O2G 7/12 .25 1/6
	O3G 7/12 7/12 1/6
	O1H 7/12 1/12 2/3
	O2H 2/3 .25 1/2
	O3H 2/3 1/12 0
	O1J 5/6 1/12 1/3
	O2J 3/4 .25 1/6
	O3J 3/4 1/12 2/3
	O1K 3/4 7/12 1/6
	O2K 5/6 3/4 1/3
	O3K 5/6 5/12 1/3
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #30 based on stacking sequence ABABABACBABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003038
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 7/12 1/6
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 0
	Mg1d 5/8 1/12 0
	Mg2d 5/8 .25 1/2
	SiJ 11/16 5/12 0
	SiK 35/48 1/12 1/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 11/12 1/6
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 5/12 0
	O2J 2/3 3/4 1/3
	O3J 2/3 5/12 1/3
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/2
	O3K 3/4 1/12 0
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #31 based on stacking sequence ABABABACBCBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003039
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 7/12 1/6
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 0
	Mg1d 5/8 1/12 0
	Mg2d 5/8 .25 1/2
	SiJ 11/16 5/12 2/3
	SiK 35/48 1/12 1/3
	Mg1e 19/24 5/12 0
	Mg2e 19/24 .25 1/2
	SiL 41/48 11/12 1/6
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 5/12 2/3
	O2J 2/3 3/4 1/3
	O3J 2/3 5/12 1/3
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #32a based on stacking sequence ABABABCABCAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003040
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 5/12 0
	Mg2c 11/24 .25 1/2
	SiG 25/48 1/12 0
	SiH 9/16 7/12 1/6
	Mg1d 5/8 1/12 2/3
	Mg2d 5/8 .25 1/6
	SiJ 11/16 5/12 2/3
	SiK 35/48 1/12 1/3
	Mg1e 19/24 7/12 5/6
	Mg2e 19/24 .25 5/6
	SiL 41/48 11/12 1/6
	SiM 43/48 7/12 1/2
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 0
	O2G 1/2 .25 1/6
	O3G 1/2 1/12 2/3
	O1H 1/2 7/12 1/6
	O2H 7/12 3/4 0
	O3H 7/12 5/12 0
	O1J 3/4 5/12 2/3
	O2J 2/3 .25 5/6
	O3J 2/3 7/12 5/6
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #32b based on stacking sequence ABABABCABCAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003041
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/2
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 2/3
	Mg2c 3/8 .25 1/6
	SiE 7/16 1/12 2/3
	SiF 23/48 5/12 1/3
	Mg1d 13/24 1/12 1/3
	Mg2d 13/24 .25 5/6
	SiG 29/48 7/12 5/6
	SiH 31/48 1/12 0
	Mg1e 17/24 5/12 0
	Mg2e 17/24 .25 1/2
	SiJ 37/48 1/12 0
	SiK 13/16 5/12 2/3
	Mg1f 7/8 1/12 1/3
	Mg2f 7/8 .25 5/6
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 5/12 0
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/2
	O3D 1/3 1/12 0
	O1E 1/2 1/12 2/3
	O2E 5/12 .25 5/6
	O3E 5/12 1/12 1/3
	O1F 5/12 5/12 1/3
	O2F 1/2 .25 1/6
	O3F 1/2 5/12 2/3
	O1G 2/3 7/12 5/6
	O2G 7/12 .25 1/2
	O3G 7/12 5/12 0
	O1H 7/12 1/12 0
	O2H 2/3 .25 5/6
	O3H 2/3 1/12 1/3
	O1J 5/6 1/12 0
	O2J 3/4 .25 1/6
	O3J 3/4 1/12 2/3
	O1K 3/4 7/12 1/6
	O2K 5/6 3/4 0
	O3K 5/6 5/12 0
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #33a based on stacking sequence ABABABCABCBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003042
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 5/12 0
	Mg2c 11/24 .25 1/2
	SiG 25/48 1/12 0
	SiH 9/16 7/12 1/6
	Mg1d 5/8 1/12 2/3
	Mg2d 5/8 .25 1/6
	SiJ 11/16 5/12 2/3
	SiK 35/48 1/12 1/3
	Mg1e 19/24 5/12 0
	Mg2e 19/24 .25 1/2
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 0
	O2G 1/2 .25 1/6
	O3G 1/2 1/12 2/3
	O1H 1/2 7/12 1/6
	O2H 7/12 3/4 0
	O3H 7/12 5/12 0
	O1J 3/4 5/12 2/3
	O2J 2/3 .25 5/6
	O3J 2/3 7/12 5/6
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #33b based on stacking sequence ABABABCABCBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003043
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/2
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 2/3
	Mg2c 3/8 .25 1/6
	SiE 7/16 1/12 2/3
	SiF 23/48 5/12 1/3
	Mg1d 13/24 1/12 1/3
	Mg2d 13/24 .25 5/6
	SiG 29/48 7/12 5/6
	SiH 31/48 1/12 0
	Mg1e 17/24 5/12 0
	Mg2e 17/24 .25 1/2
	SiJ 37/48 1/12 1/3
	SiK 13/16 7/12 1/6
	Mg1f 7/8 1/12 0
	Mg2f 7/8 .25 1/2
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 5/12 0
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/2
	O3D 1/3 1/12 0
	O1E 1/2 1/12 2/3
	O2E 5/12 .25 5/6
	O3E 5/12 1/12 1/3
	O1F 5/12 5/12 1/3
	O2F 1/2 .25 1/6
	O3F 1/2 5/12 2/3
	O1G 2/3 7/12 5/6
	O2G 7/12 .25 1/2
	O3G 7/12 5/12 0
	O1H 7/12 1/12 0
	O2H 2/3 .25 5/6
	O3H 2/3 1/12 1/3
	O1J 5/6 1/12 1/3
	O2J 3/4 .25 1/6
	O3J 3/4 1/12 2/3
	O1K 3/4 7/12 1/6
	O2K 5/6 .25 5/6
	O3K 5/6 5/12 1/3
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #34a based on stacking sequence ABABABCACBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003044
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 5/12 0
	Mg2c 11/24 .25 1/2
	SiG 25/48 1/12 0
	SiH 9/16 7/12 1/6
	Mg1d 5/8 1/12 1/3
	Mg2d 5/8 .25 5/6
	SiJ 11/16 5/12 1/3
	SiK 35/48 1/12 2/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 11/12 1/6
	SiM 43/48 7/12 1/2
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 0
	O2G 1/2 .25 1/6
	O3G 1/2 1/12 2/3
	O1H 1/2 7/12 1/6
	O2H 7/12 3/4 0
	O3H 7/12 5/12 0
	O1J 3/4 5/12 1/3
	O2J 2/3 .25 1/6
	O3J 2/3 7/12 1/6
	O1K 2/3 1/12 2/3
	O2K 3/4 .25 5/6
	O3K 3/4 1/12 1/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #34b based on stacking sequence ABABABCACBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003045
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/2
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 2/3
	Mg2c 3/8 .25 1/6
	SiE 7/16 1/12 2/3
	SiF 23/48 5/12 1/3
	Mg1d 13/24 1/12 1/3
	Mg2d 13/24 .25 5/6
	SiG 29/48 5/12 2/3
	SiH 31/48 1/12 0
	Mg1e 17/24 5/12 0
	Mg2e 17/24 .25 1/2
	SiJ 37/48 1/12 0
	SiK 13/16 5/12 1/3
	Mg1f 7/8 1/12 1/3
	Mg2f 7/8 .25 5/6
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 5/12 0
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/2
	O3D 1/3 1/12 0
	O1E 1/2 1/12 2/3
	O2E 5/12 .25 5/6
	O3E 5/12 1/12 1/3
	O1F 5/12 5/12 1/3
	O2F 1/2 .25 1/6
	O3F 1/2 5/12 2/3
	O1G 2/3 5/12 2/3
	O2G 7/12 .25 1/2
	O3G 7/12 5/12 0
	O1H 7/12 1/12 0
	O2H 2/3 .25 1/6
	O3H 2/3 1/12 2/3
	O1J 5/6 1/12 0
	O2J 3/4 .25 5/6
	O3J 3/4 1/12 1/3
	O1K 3/4 5/12 1/3
	O2K 5/6 3/4 0
	O3K 5/6 5/12 0
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #35a based on stacking sequence ABABABCBACAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003046
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 5/12 0
	Mg2c 11/24 .25 1/2
	SiG 25/48 1/12 1/3
	SiH 9/16 7/12 1/6
	Mg1d 5/8 1/12 2/3
	Mg2d 5/8 .25 1/6
	SiJ 11/16 7/12 1/6
	SiK 35/48 1/12 0
	Mg1e 19/24 7/12 5/6
	Mg2e 19/24 .25 5/6
	SiL 41/48 11/12 1/6
	SiM 43/48 7/12 1/2
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/6
	O3G 1/2 1/12 2/3
	O1H 1/2 7/12 1/6
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 2/3
	O2J 2/3 3/4 0
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #35b based on stacking sequence ABABABCBACAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003047
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/2
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 2/3
	Mg2c 3/8 .25 1/6
	SiE 7/16 1/12 2/3
	SiF 23/48 5/12 1/3
	Mg1d 13/24 1/12 0
	Mg2d 13/24 .25 1/2
	SiG 29/48 5/12 0
	SiH 31/48 1/12 1/3
	Mg1e 17/24 5/12 1/3
	Mg2e 17/24 .25 5/6
	SiJ 37/48 1/12 0
	SiK 13/16 5/12 2/3
	Mg1f 7/8 1/12 1/3
	Mg2f 7/8 .25 5/6
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 5/12 0
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/2
	O3D 1/3 1/12 0
	O1E 1/2 1/12 2/3
	O2E 5/12 .25 5/6
	O3E 5/12 1/12 1/3
	O1F 5/12 5/12 1/3
	O2F 1/2 .25 1/6
	O3F 1/2 5/12 2/3
	O1G 2/3 5/12 0
	O2G 7/12 3/4 1/3
	O3G 7/12 5/12 1/3
	O1H 7/12 1/12 1/3
	O2H 2/3 .25 1/2
	O3H 2/3 1/12 0
	O1J 5/6 1/12 0
	O2J 3/4 .25 1/6
	O3J 3/4 1/12 2/3
	O1K 3/4 7/12 1/6
	O2K 5/6 3/4 0
	O3K 5/6 5/12 0
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #36 based on stacking sequence ABABACABACAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003048
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 1/6
	SiF 19/48 1/12 0
	Mg1c 11/24 5/12 1/3
	Mg2c 11/24 .25 5/6
	SiG 25/48 11/12 5/6
	SiH 9/16 7/12 1/2
	Mg1d 5/8 11/12 1/6
	Mg2d 5/8 .25 1/6
	SiJ 11/16 7/12 1/6
	SiK 35/48 11/12 1/2
	Mg1e 19/24 7/12 5/6
	Mg2e 19/24 .25 5/6
	SiL 41/48 11/12 1/6
	SiM 43/48 7/12 1/2
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 1/6
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 1/6
	O3F 5/12 1/12 2/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 2/3
	O2J 2/3 .25 1/2
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #37a based on stacking sequence ABABACABACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003049
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 1/6
	SiF 19/48 1/12 0
	Mg1c 11/24 5/12 1/3
	Mg2c 11/24 .25 5/6
	SiG 25/48 11/12 5/6
	SiH 9/16 7/12 1/2
	Mg1d 5/8 11/12 1/6
	Mg2d 5/8 .25 1/6
	SiJ 11/16 7/12 1/6
	SiK 35/48 11/12 1/2
	Mg1e 19/24 7/12 1/2
	Mg2e 19/24 .25 1/2
	SiL 41/48 11/12 1/6
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 1/6
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 1/6
	O3F 5/12 1/12 2/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 2/3
	O2J 2/3 .25 1/2
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #37b based on stacking sequence ABABACABACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003050
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/2
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 1/3
	Mg2c 3/8 .25 5/6
	SiE 7/16 1/12 0
	SiF 23/48 7/12 1/6
	Mg1d 13/24 1/12 2/3
	Mg2d 13/24 .25 1/6
	SiG 29/48 5/12 0
	SiH 31/48 1/12 1/3
	Mg1e 17/24 5/12 1/3
	Mg2e 17/24 .25 5/6
	SiJ 37/48 11/12 5/6
	SiK 13/16 7/12 1/6
	Mg1f 7/8 1/12 0
	Mg2f 7/8 .25 1/2
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 5/12 0
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/2
	O3D 1/3 1/12 0
	O1E 1/2 1/12 0
	O2E 5/12 .25 1/6
	O3E 5/12 1/12 2/3
	O1F 5/12 7/12 1/6
	O2F 1/2 3/4 0
	O3F 1/2 5/12 0
	O1G 2/3 5/12 0
	O2G 7/12 3/4 1/3
	O3G 7/12 5/12 1/3
	O1H 7/12 1/12 1/3
	O2H 2/3 .25 1/2
	O3H 2/3 1/12 0
	O1J 5/6 1/12 1/3
	O2J 3/4 .25 1/6
	O3J 3/4 1/12 2/3
	O1K 3/4 7/12 1/6
	O2K 5/6 3/4 1/3
	O3K 5/6 5/12 1/3
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #38a based on stacking sequence ABABACABCABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003051
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 1/6
	SiF 19/48 1/12 0
	Mg1c 11/24 5/12 1/3
	Mg2c 11/24 .25 5/6
	SiG 25/48 11/12 5/6
	SiH 9/16 7/12 1/2
	Mg1d 5/8 1/12 0
	Mg2d 5/8 .25 1/2
	SiJ 11/16 5/12 0
	SiK 35/48 1/12 2/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 11/12 1/6
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 1/6
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 1/6
	O3F 5/12 1/12 2/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 0
	O2J 2/3 .25 1/6
	O3J 2/3 7/12 1/6
	O1K 2/3 1/12 2/3
	O2K 3/4 .25 1/2
	O3K 3/4 1/12 0
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #38b based on stacking sequence ABABACABCABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003052
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/2
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 1/3
	Mg2c 3/8 .25 5/6
	SiE 7/16 1/12 0
	SiF 23/48 7/12 1/6
	Mg1d 13/24 1/12 2/3
	Mg2d 13/24 .25 1/6
	SiG 29/48 7/12 1/6
	SiH 31/48 1/12 1/3
	Mg1e 17/24 5/12 1/3
	Mg2e 17/24 .25 5/6
	SiJ 37/48 1/12 1/3
	SiK 13/16 5/12 0
	Mg1f 7/8 1/12 0
	Mg2f 7/8 .25 1/2
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 5/12 0
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/2
	O3D 1/3 1/12 0
	O1E 1/2 1/12 0
	O2E 5/12 .25 1/6
	O3E 5/12 1/12 2/3
	O1F 5/12 7/12 1/6
	O2F 1/2 3/4 0
	O3F 1/2 5/12 0
	O1G 2/3 7/12 1/6
	O2G 7/12 3/4 1/3
	O3G 7/12 5/12 1/3
	O1H 7/12 1/12 1/3
	O2H 2/3 .25 1/6
	O3H 2/3 1/12 2/3
	O1J 5/6 1/12 1/3
	O2J 3/4 .25 1/2
	O3J 3/4 1/12 0
	O1K 3/4 5/12 0
	O2K 5/6 3/4 1/3
	O3K 5/6 5/12 1/3
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #39 based on stacking sequence ABABACABCBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003053
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 1/6
	SiF 19/48 1/12 0
	Mg1c 11/24 5/12 1/3
	Mg2c 11/24 .25 5/6
	SiG 25/48 11/12 5/6
	SiH 9/16 7/12 1/2
	Mg1d 5/8 1/12 0
	Mg2d 5/8 .25 1/2
	SiJ 11/16 5/12 1/3
	SiK 35/48 1/12 2/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 0
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 1/6
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 1/6
	O3F 5/12 1/12 2/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 1/3
	O2J 2/3 .25 1/6
	O3J 2/3 7/12 1/6
	O1K 2/3 1/12 2/3
	O2K 3/4 .25 5/6
	O3K 3/4 1/12 1/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #40a based on stacking sequence ABABACACBABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003054
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 1/6
	SiF 19/48 1/12 0
	Mg1c 11/24 5/12 1/3
	Mg2c 11/24 .25 5/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 0
	Mg1d 5/8 1/12 0
	Mg2d 5/8 .25 1/2
	SiJ 11/16 5/12 0
	SiK 35/48 1/12 1/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 11/12 1/6
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 1/6
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 1/6
	O3F 5/12 1/12 2/3
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 5/12 0
	O2J 2/3 3/4 1/3
	O3J 2/3 5/12 1/3
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/2
	O3K 3/4 1/12 0
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #40b based on stacking sequence ABABACACBABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003055
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/2
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 1/3
	Mg2c 3/8 .25 5/6
	SiE 7/16 1/12 0
	SiF 23/48 7/12 1/6
	Mg1d 13/24 1/12 1/3
	Mg2d 13/24 .25 5/6
	SiG 29/48 5/12 1/3
	SiH 31/48 1/12 2/3
	Mg1e 17/24 5/12 2/3
	Mg2e 17/24 .25 1/6
	SiJ 37/48 1/12 1/3
	SiK 13/16 5/12 0
	Mg1f 7/8 1/12 0
	Mg2f 7/8 .25 1/2
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 5/12 0
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/2
	O3D 1/3 1/12 0
	O1E 1/2 1/12 0
	O2E 5/12 .25 1/6
	O3E 5/12 1/12 2/3
	O1F 5/12 7/12 1/6
	O2F 1/2 3/4 0
	O3F 1/2 5/12 0
	O1G 2/3 5/12 1/3
	O2G 7/12 .25 1/6
	O3G 7/12 7/12 1/6
	O1H 7/12 1/12 2/3
	O2H 2/3 .25 5/6
	O3H 2/3 1/12 1/3
	O1J 5/6 1/12 1/3
	O2J 3/4 .25 1/2
	O3J 3/4 1/12 0
	O1K 3/4 5/12 0
	O2K 5/6 3/4 1/3
	O3K 5/6 5/12 1/3
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #41 based on stacking sequence ABABACACBCAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003056
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 1/6
	SiF 19/48 1/12 0
	Mg1c 11/24 5/12 1/3
	Mg2c 11/24 .25 5/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 0
	Mg1d 5/8 1/12 0
	Mg2d 5/8 .25 1/2
	SiJ 11/16 7/12 1/6
	SiK 35/48 1/12 1/3
	Mg1e 19/24 5/12 1/3
	Mg2e 19/24 .25 5/6
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 0
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 1/6
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 1/6
	O3F 5/12 1/12 2/3
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 7/12 1/6
	O2J 2/3 3/4 1/3
	O3J 2/3 5/12 1/3
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #42a based on stacking sequence ABABACBABCBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003057
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 1/6
	SiF 19/48 1/12 0
	Mg1c 11/24 5/12 0
	Mg2c 11/24 .25 1/2
	SiG 25/48 1/12 0
	SiH 9/16 5/12 1/3
	Mg1d 5/8 1/12 2/3
	Mg2d 5/8 .25 1/6
	SiJ 11/16 5/12 2/3
	SiK 35/48 1/12 1/3
	Mg1e 19/24 5/12 0
	Mg2e 19/24 .25 1/2
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 1/6
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 1/6
	O3F 5/12 1/12 2/3
	O1G 7/12 1/12 0
	O2G 1/2 .25 5/6
	O3G 1/2 1/12 1/3
	O1H 1/2 5/12 1/3
	O2H 7/12 3/4 0
	O3H 7/12 5/12 0
	O1J 3/4 5/12 2/3
	O2J 2/3 .25 5/6
	O3J 2/3 7/12 5/6
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #42b based on stacking sequence ABABACBABCBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003058
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/2
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 1/3
	Mg2c 3/8 .25 5/6
	SiE 7/16 1/12 1/3
	SiF 23/48 7/12 1/6
	Mg1d 13/24 1/12 2/3
	Mg2d 13/24 .25 1/6
	SiG 29/48 7/12 5/6
	SiH 31/48 1/12 0
	Mg1e 17/24 5/12 0
	Mg2e 17/24 .25 1/2
	SiJ 37/48 1/12 1/3
	SiK 13/16 7/12 1/6
	Mg1f 7/8 1/12 0
	Mg2f 7/8 .25 1/2
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 5/12 0
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/2
	O3D 1/3 1/12 0
	O1E 1/2 1/12 1/3
	O2E 5/12 .25 1/6
	O3E 5/12 1/12 2/3
	O1F 5/12 7/12 1/6
	O2F 1/2 3/4 1/3
	O3F 1/2 5/12 1/3
	O1G 2/3 7/12 5/6
	O2G 7/12 .25 1/2
	O3G 7/12 5/12 0
	O1H 7/12 1/12 0
	O2H 2/3 .25 5/6
	O3H 2/3 1/12 1/3
	O1J 5/6 1/12 1/3
	O2J 3/4 .25 1/6
	O3J 3/4 1/12 2/3
	O1K 3/4 7/12 1/6
	O2K 5/6 .25 5/6
	O3K 5/6 5/12 1/3
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #43 based on stacking sequence ABABACBACABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003059
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 1/6
	SiF 19/48 1/12 0
	Mg1c 11/24 5/12 0
	Mg2c 11/24 .25 1/2
	SiG 25/48 1/12 0
	SiH 9/16 5/12 1/3
	Mg1d 5/8 1/12 1/3
	Mg2d 5/8 .25 5/6
	SiJ 11/16 5/12 0
	SiK 35/48 1/12 2/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 1/6
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 1/6
	O3F 5/12 1/12 2/3
	O1G 7/12 1/12 0
	O2G 1/2 .25 5/6
	O3G 1/2 1/12 1/3
	O1H 1/2 5/12 1/3
	O2H 7/12 3/4 0
	O3H 7/12 5/12 0
	O1J 3/4 5/12 0
	O2J 2/3 .25 1/6
	O3J 2/3 7/12 1/6
	O1K 2/3 1/12 2/3
	O2K 3/4 .25 1/2
	O3K 3/4 1/12 0
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #44 based on stacking sequence ABABACBCACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003060
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 11/12 1/6
	Mg2b 7/24 .25 1/6
	SiE 17/48 7/12 1/6
	SiF 19/48 1/12 0
	Mg1c 11/24 5/12 0
	Mg2c 11/24 .25 1/2
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 1/3
	Mg1d 5/8 1/12 1/3
	Mg2d 5/8 .25 5/6
	SiJ 11/16 7/12 1/6
	SiK 35/48 1/12 0
	Mg1e 19/24 5/12 0
	Mg2e 19/24 .25 1/2
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 1/6
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 1/6
	O3F 5/12 1/12 2/3
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 5/6
	O3G 1/2 1/12 1/3
	O1H 1/2 5/12 1/3
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 5/12 2/3
	O2J 2/3 3/4 0
	O3J 2/3 1/12 0
	O1K 2/3 5/12 0
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #45a based on stacking sequence ABABCABABCAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003061
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 1/12 0
	Mg2b 7/24 .25 1/2
	SiE 17/48 5/12 0
	SiF 19/48 1/12 2/3
	Mg1c 11/24 5/12 2/3
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 0
	SiH 9/16 5/12 1/3
	Mg1d 5/8 1/12 2/3
	Mg2d 5/8 .25 1/6
	SiJ 11/16 5/12 2/3
	SiK 35/48 1/12 1/3
	Mg1e 19/24 7/12 5/6
	Mg2e 19/24 .25 5/6
	SiL 41/48 11/12 1/6
	SiM 43/48 7/12 1/2
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 0
	O2E 1/3 .25 1/6
	O3E 1/3 7/12 1/6
	O1F 1/3 1/12 2/3
	O2F 5/12 .25 1/2
	O3F 5/12 1/12 0
	O1G 7/12 1/12 0
	O2G 1/2 .25 5/6
	O3G 1/2 1/12 1/3
	O1H 1/2 5/12 1/3
	O2H 7/12 3/4 0
	O3H 7/12 5/12 0
	O1J 3/4 5/12 2/3
	O2J 2/3 .25 5/6
	O3J 2/3 7/12 5/6
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #45b based on stacking sequence ABABCABABCAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003062
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/6
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 1/3
	Mg2c 3/8 .25 5/6
	SiE 7/16 1/12 1/3
	SiF 23/48 5/12 0
	Mg1d 13/24 1/12 2/3
	Mg2d 13/24 .25 1/6
	SiG 29/48 7/12 5/6
	SiH 31/48 1/12 0
	Mg1e 17/24 5/12 0
	Mg2e 17/24 .25 1/2
	SiJ 37/48 1/12 0
	SiK 13/16 5/12 2/3
	Mg1f 7/8 1/12 1/3
	Mg2f 7/8 .25 5/6
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 7/12 1/6
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/6
	O3D 1/3 1/12 2/3
	O1E 1/2 1/12 1/3
	O2E 5/12 .25 1/2
	O3E 5/12 1/12 0
	O1F 5/12 5/12 0
	O2F 1/2 3/4 1/3
	O3F 1/2 5/12 1/3
	O1G 2/3 7/12 5/6
	O2G 7/12 .25 1/2
	O3G 7/12 5/12 0
	O1H 7/12 1/12 0
	O2H 2/3 .25 5/6
	O3H 2/3 1/12 1/3
	O1J 5/6 1/12 0
	O2J 3/4 .25 1/6
	O3J 3/4 1/12 2/3
	O1K 3/4 7/12 1/6
	O2K 5/6 3/4 0
	O3K 5/6 5/12 0
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #46a based on stacking sequence ABABCABACABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003063
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 1/12 0
	Mg2b 7/24 .25 1/2
	SiE 17/48 5/12 0
	SiF 19/48 1/12 2/3
	Mg1c 11/24 5/12 2/3
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 0
	SiH 9/16 5/12 1/3
	Mg1d 5/8 1/12 1/3
	Mg2d 5/8 .25 5/6
	SiJ 11/16 5/12 0
	SiK 35/48 1/12 2/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 0
	O2E 1/3 .25 1/6
	O3E 1/3 7/12 1/6
	O1F 1/3 1/12 2/3
	O2F 5/12 .25 1/2
	O3F 5/12 1/12 0
	O1G 7/12 1/12 0
	O2G 1/2 .25 5/6
	O3G 1/2 1/12 1/3
	O1H 1/2 5/12 1/3
	O2H 7/12 3/4 0
	O3H 7/12 5/12 0
	O1J 3/4 5/12 0
	O2J 2/3 .25 1/6
	O3J 2/3 7/12 1/6
	O1K 2/3 1/12 2/3
	O2K 3/4 .25 1/2
	O3K 3/4 1/12 0
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #46b based on stacking sequence ABABCABACABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003064
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/6
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 1/3
	Mg2c 3/8 .25 5/6
	SiE 7/16 1/12 1/3
	SiF 23/48 5/12 0
	Mg1d 13/24 1/12 2/3
	Mg2d 13/24 .25 1/6
	SiG 29/48 7/12 1/6
	SiH 31/48 1/12 0
	Mg1e 17/24 5/12 1/3
	Mg2e 17/24 .25 5/6
	SiJ 37/48 1/12 1/3
	SiK 13/16 5/12 0
	Mg1f 7/8 1/12 0
	Mg2f 7/8 .25 1/2
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 7/12 1/6
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/6
	O3D 1/3 1/12 2/3
	O1E 1/2 1/12 1/3
	O2E 5/12 .25 1/2
	O3E 5/12 1/12 0
	O1F 5/12 5/12 0
	O2F 1/2 3/4 1/3
	O3F 1/2 5/12 1/3
	O1G 2/3 7/12 1/6
	O2G 7/12 .25 1/2
	O3G 7/12 5/12 0
	O1H 7/12 1/12 0
	O2H 2/3 .25 1/6
	O3H 2/3 1/12 2/3
	O1J 5/6 1/12 1/3
	O2J 3/4 .25 1/2
	O3J 3/4 1/12 0
	O1K 3/4 5/12 0
	O2K 5/6 3/4 1/3
	O3K 5/6 5/12 1/3
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #47a based on stacking sequence ABABCABACBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003065
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 1/12 0
	Mg2b 7/24 .25 1/2
	SiE 17/48 5/12 0
	SiF 19/48 1/12 2/3
	Mg1c 11/24 5/12 2/3
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 0
	SiH 9/16 5/12 1/3
	Mg1d 5/8 1/12 1/3
	Mg2d 5/8 .25 5/6
	SiJ 11/16 5/12 1/3
	SiK 35/48 1/12 2/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 0
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 0
	O2E 1/3 .25 1/6
	O3E 1/3 7/12 1/6
	O1F 1/3 1/12 2/3
	O2F 5/12 .25 1/2
	O3F 5/12 1/12 0
	O1G 7/12 1/12 0
	O2G 1/2 .25 5/6
	O3G 1/2 1/12 1/3
	O1H 1/2 5/12 1/3
	O2H 7/12 3/4 0
	O3H 7/12 5/12 0
	O1J 3/4 5/12 1/3
	O2J 2/3 .25 1/6
	O3J 2/3 7/12 1/6
	O1K 2/3 1/12 2/3
	O2K 3/4 .25 5/6
	O3K 3/4 1/12 1/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #47b based on stacking sequence ABABCABACBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003066
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/6
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 1/3
	Mg2c 3/8 .25 5/6
	SiE 7/16 1/12 1/3
	SiF 23/48 5/12 0
	Mg1d 13/24 1/12 2/3
	Mg2d 13/24 .25 1/6
	SiG 29/48 7/12 1/6
	SiH 31/48 1/12 0
	Mg1e 17/24 5/12 0
	Mg2e 17/24 .25 1/2
	SiJ 37/48 1/12 0
	SiK 13/16 5/12 1/3
	Mg1f 7/8 1/12 1/3
	Mg2f 7/8 .25 5/6
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 7/12 1/6
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/6
	O3D 1/3 1/12 2/3
	O1E 1/2 1/12 1/3
	O2E 5/12 .25 1/2
	O3E 5/12 1/12 0
	O1F 5/12 5/12 0
	O2F 1/2 3/4 1/3
	O3F 1/2 5/12 1/3
	O1G 2/3 7/12 1/6
	O2G 7/12 .25 1/2
	O3G 7/12 5/12 0
	O1H 7/12 1/12 0
	O2H 2/3 .25 1/6
	O3H 2/3 1/12 2/3
	O1J 5/6 1/12 0
	O2J 3/4 .25 5/6
	O3J 3/4 1/12 1/3
	O1K 3/4 5/12 1/3
	O2K 5/6 3/4 0
	O3K 5/6 5/12 0
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #48a based on stacking sequence ABABCABCABAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003067
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 1/12 0
	Mg2b 7/24 .25 1/2
	SiE 17/48 5/12 0
	SiF 19/48 1/12 2/3
	Mg1c 11/24 5/12 2/3
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 1/3
	Mg1d 5/8 1/12 1/3
	Mg2d 5/8 .25 5/6
	SiJ 11/16 5/12 1/3
	SiK 35/48 1/12 0
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 0
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 0
	O2E 1/3 .25 1/6
	O3E 1/3 7/12 1/6
	O1F 1/3 1/12 2/3
	O2F 5/12 .25 1/2
	O3F 5/12 1/12 0
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 5/6
	O3G 1/2 1/12 1/3
	O1H 1/2 5/12 1/3
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 5/12 1/3
	O2J 2/3 3/4 0
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 5/6
	O3K 3/4 1/12 1/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #48b based on stacking sequence ABABCABCABAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003068
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/6
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 1/3
	Mg2c 3/8 .25 5/6
	SiE 7/16 1/12 1/3
	SiF 23/48 5/12 0
	Mg1d 13/24 1/12 0
	Mg2d 13/24 .25 1/2
	SiG 29/48 5/12 0
	SiH 31/48 1/12 2/3
	Mg1e 17/24 5/12 2/3
	Mg2e 17/24 .25 1/6
	SiJ 37/48 1/12 0
	SiK 13/16 5/12 1/3
	Mg1f 7/8 1/12 1/3
	Mg2f 7/8 .25 5/6
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 7/12 1/6
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/6
	O3D 1/3 1/12 2/3
	O1E 1/2 1/12 1/3
	O2E 5/12 .25 1/2
	O3E 5/12 1/12 0
	O1F 5/12 5/12 0
	O2F 1/2 3/4 1/3
	O3F 1/2 5/12 1/3
	O1G 2/3 5/12 0
	O2G 7/12 .25 1/6
	O3G 7/12 7/12 1/6
	O1H 7/12 1/12 2/3
	O2H 2/3 .25 1/2
	O3H 2/3 1/12 0
	O1J 5/6 1/12 0
	O2J 3/4 .25 5/6
	O3J 3/4 1/12 1/3
	O1K 3/4 5/12 1/3
	O2K 5/6 3/4 0
	O3K 5/6 5/12 0
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #49a based on stacking sequence ABABCABCACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003069
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 1/12 0
	Mg2b 7/24 .25 1/2
	SiE 17/48 5/12 0
	SiF 19/48 1/12 2/3
	Mg1c 11/24 5/12 2/3
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 1/3
	Mg1d 5/8 1/12 1/3
	Mg2d 5/8 .25 5/6
	SiJ 11/16 7/12 1/6
	SiK 35/48 1/12 0
	Mg1e 19/24 5/12 0
	Mg2e 19/24 .25 1/2
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 0
	O2E 1/3 .25 1/6
	O3E 1/3 7/12 1/6
	O1F 1/3 1/12 2/3
	O2F 5/12 .25 1/2
	O3F 5/12 1/12 0
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 5/6
	O3G 1/2 1/12 1/3
	O1H 1/2 5/12 1/3
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 7/12 1/6
	O2J 2/3 3/4 0
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #49b based on stacking sequence ABABCABCACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003070
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/6
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 1/3
	Mg2c 3/8 .25 5/6
	SiE 7/16 1/12 1/3
	SiF 23/48 5/12 0
	Mg1d 13/24 1/12 0
	Mg2d 13/24 .25 1/2
	SiG 29/48 5/12 0
	SiH 31/48 1/12 2/3
	Mg1e 17/24 5/12 1/3
	Mg2e 17/24 .25 5/6
	SiJ 37/48 1/12 1/3
	SiK 13/16 7/12 1/6
	Mg1f 7/8 1/12 0
	Mg2f 7/8 .25 1/2
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 7/12 1/6
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/6
	O3D 1/3 1/12 2/3
	O1E 1/2 1/12 1/3
	O2E 5/12 .25 1/2
	O3E 5/12 1/12 0
	O1F 5/12 5/12 0
	O2F 1/2 3/4 1/3
	O3F 1/2 5/12 1/3
	O1G 2/3 5/12 0
	O2G 7/12 .25 1/6
	O3G 7/12 7/12 1/6
	O1H 7/12 1/12 2/3
	O2H 2/3 .25 1/2
	O3H 2/3 1/12 0
	O1J 5/6 1/12 1/3
	O2J 3/4 .25 1/6
	O3J 3/4 1/12 2/3
	O1K 3/4 7/12 1/6
	O2K 5/6 3/4 1/3
	O3K 5/6 5/12 1/3
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #50 based on stacking sequence ABABCACBABAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003071
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 1/12 0
	Mg2b 7/24 .25 1/2
	SiE 17/48 5/12 0
	SiF 19/48 1/12 2/3
	Mg1c 11/24 5/12 1/3
	Mg2c 11/24 .25 5/6
	SiG 25/48 1/12 1/3
	SiH 9/16 7/12 1/6
	Mg1d 5/8 1/12 2/3
	Mg2d 5/8 .25 1/6
	SiJ 11/16 5/12 1/3
	SiK 35/48 1/12 0
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 0
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 0
	O2E 1/3 .25 1/6
	O3E 1/3 7/12 1/6
	O1F 1/3 1/12 2/3
	O2F 5/12 .25 1/2
	O3F 5/12 1/12 0
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/6
	O3G 1/2 1/12 2/3
	O1H 1/2 7/12 1/6
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 1/3
	O2J 2/3 3/4 0
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 5/6
	O3K 3/4 1/12 1/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #51a based on stacking sequence ABABCBABCBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003072
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 1/12 0
	Mg2b 7/24 .25 1/2
	SiE 17/48 7/12 5/6
	SiF 19/48 1/12 2/3
	Mg1c 11/24 5/12 2/3
	Mg2c 11/24 .25 1/6
	SiG 25/48 11/12 5/6
	SiH 9/16 7/12 1/2
	Mg1d 5/8 1/12 0
	Mg2d 5/8 .25 1/2
	SiJ 11/16 5/12 1/3
	SiK 35/48 1/12 2/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 0
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 7/12 5/6
	O2E 1/3 .25 1/6
	O3E 1/3 7/12 1/6
	O1F 1/3 1/12 2/3
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 1/3
	O2J 2/3 .25 1/6
	O3J 2/3 7/12 1/6
	O1K 2/3 1/12 2/3
	O2K 3/4 .25 5/6
	O3K 3/4 1/12 1/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #51b based on stacking sequence ABABCBABCBAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003073
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	Mg1a 1/24 7/12 1/6
	Mg2a 1/24 .25 1/6
	SiA 5/48 1/12 0
	SiB 7/48 5/12 1/3
	Mg1b 5/24 1/12 2/3
	Mg2b 5/24 .25 1/6
	SiC 13/48 7/12 1/6
	SiD 5/16 1/12 1/3
	Mg1c 3/8 5/12 0
	Mg2c 3/8 .25 1/2
	SiE 7/16 1/12 0
	SiF 23/48 5/12 1/3
	Mg1d 13/24 1/12 2/3
	Mg2d 13/24 .25 1/6
	SiG 29/48 7/12 1/6
	SiH 31/48 1/12 1/3
	Mg1e 17/24 5/12 0
	Mg2e 17/24 .25 1/2
	SiJ 37/48 1/12 0
	SiK 13/16 5/12 1/3
	Mg1f 7/8 1/12 1/3
	Mg2f 7/8 .25 5/6
	SiL 15/16 7/12 1/2
	SiM 47/48 11/12 1/6
	O1A 1/6 1/12 0
	O2A 1/12 .25 5/6
	O3A 1/12 1/12 1/3
	O1B 1/12 5/12 1/3
	O2B 1/6 .25 1/2
	O3B 1/6 5/12 0
	O1C 1/3 7/12 1/6
	O2C .25 3/4 1/3
	O3C .25 5/12 1/3
	O1D .25 1/12 1/3
	O2D 1/3 .25 1/6
	O3D 1/3 1/12 2/3
	O1E 1/2 1/12 0
	O2E 5/12 .25 5/6
	O3E 5/12 1/12 1/3
	O1F 5/12 5/12 1/3
	O2F 1/2 3/4 0
	O3F 1/2 5/12 0
	O1G 2/3 7/12 1/6
	O2G 7/12 3/4 1/3
	O3G 7/12 5/12 1/3
	O1H 7/12 1/12 1/3
	O2H 2/3 .25 1/6
	O3H 2/3 1/12 2/3
	O1J 5/6 1/12 0
	O2J 3/4 .25 5/6
	O3J 3/4 1/12 1/3
	O1K 3/4 5/12 1/3
	O2K 5/6 3/4 0
	O3K 5/6 5/12 0
	O1L 0 5/12 0
	O2L 11/12 .25 1/6
	O3L 11/12 7/12 1/6
	O1M 11/12 1/12 2/3
	O2M 0 .25 1/2
	O3M 0 1/12 0
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #52 based on stacking sequence ABABCBACBCAC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003074
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 11/12 5/6
	SiD 11/48 7/12 1/2
	Mg1b 7/24 1/12 0
	Mg2b 7/24 .25 1/2
	SiE 17/48 5/12 1/3
	SiF 19/48 1/12 2/3
	Mg1c 11/24 5/12 2/3
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 0
	Mg1d 5/8 1/12 0
	Mg2d 5/8 .25 1/2
	SiJ 11/16 7/12 1/6
	SiK 35/48 1/12 1/3
	Mg1e 19/24 5/12 1/3
	Mg2e 19/24 .25 5/6
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 0
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 1/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 5/6
	O3D .25 5/12 1/3
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/6
	O3E 1/3 7/12 1/6
	O1F 1/3 1/12 2/3
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 7/12 1/6
	O2J 2/3 3/4 1/3
	O3J 2/3 5/12 1/3
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 1/2
	O3L 5/6 1/12 0
	O1M 5/6 5/12 0
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #53 based on stacking sequence ABACABACBABC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003075
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 1/12 2/3
	SiD 11/48 5/12 0
	Mg1b 7/24 1/12 1/3
	Mg2b 7/24 .25 5/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 7/12 1/6
	Mg2c 11/24 .25 1/6
	SiG 25/48 1/12 2/3
	SiH 9/16 5/12 0
	Mg1d 5/8 1/12 0
	Mg2d 5/8 .25 1/2
	SiJ 11/16 5/12 0
	SiK 35/48 1/12 1/3
	Mg1e 19/24 5/12 2/3
	Mg2e 19/24 .25 1/6
	SiL 41/48 11/12 1/6
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 2/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 1/6
	O3D .25 7/12 1/6
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 2/3
	O2G 1/2 .25 1/2
	O3G 1/2 1/12 0
	O1H 1/2 5/12 0
	O2H 7/12 .25 1/6
	O3H 7/12 7/12 1/6
	O1J 3/4 5/12 0
	O2J 2/3 3/4 1/3
	O3J 2/3 5/12 1/3
	O1K 2/3 1/12 1/3
	O2K 3/4 .25 1/2
	O3K 3/4 1/12 0
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 88 (2003) 653-666
	Model pyroxenes I: Ideal pyroxene topologies
	Pyroxene #54 based on stacking sequence ABACABCBACBC
	Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
	_database_code_amcsd 0003076
	19.595917 6 3.4641016 90 90. 90 Pc
	atom x y z
	SiA 1/48 7/12 5/6
	SiB 1/16 11/12 1/2
	Mg1a 1/8 7/12 1/6
	Mg2a 1/8 .25 1/6
	SiC 3/16 1/12 2/3
	SiD 11/48 5/12 0
	Mg1b 7/24 1/12 1/3
	Mg2b 7/24 .25 5/6
	SiE 17/48 7/12 5/6
	SiF 19/48 11/12 1/2
	Mg1c 11/24 5/12 0
	Mg2c 11/24 .25 1/2
	SiG 25/48 1/12 1/3
	SiH 9/16 7/12 1/6
	Mg1d 5/8 1/12 2/3
	Mg2d 5/8 .25 1/6
	SiJ 11/16 7/12 1/6
	SiK 35/48 1/12 0
	Mg1e 19/24 5/12 0
	Mg2e 19/24 .25 1/2
	SiL 41/48 1/12 2/3
	SiM 43/48 5/12 1/3
	Mg1f 23/24 11/12 5/6
	Mg2f 23/24 .25 5/6
	O1A 1/12 7/12 5/6
	O2A 0 3/4 0
	O3A 0 5/12 0
	O1B 0 1/12 0
	O2B 1/12 .25 5/6
	O3B 1/12 1/12 1/3
	O1C .25 1/12 2/3
	O2C 1/6 .25 1/2
	O3C 1/6 1/12 0
	O1D 1/6 5/12 0
	O2D .25 .25 1/6
	O3D .25 7/12 1/6
	O1E 5/12 5/12 1/3
	O2E 1/3 .25 1/2
	O3E 1/3 7/12 1/2
	O1F 1/3 1/12 0
	O2F 5/12 .25 5/6
	O3F 5/12 1/12 1/3
	O1G 7/12 1/12 1/3
	O2G 1/2 .25 1/6
	O3G 1/2 1/12 2/3
	O1H 1/2 7/12 1/6
	O2H 7/12 3/4 1/3
	O3H 7/12 5/12 1/3
	O1J 3/4 5/12 2/3
	O2J 2/3 3/4 0
	O3J 2/3 5/12 0
	O1K 2/3 1/12 0
	O2K 3/4 .25 1/6
	O3K 3/4 1/12 2/3
	O1L 11/12 1/12 2/3
	O2L 5/6 .25 5/6
	O3L 5/6 1/12 1/3
	O1M 5/6 5/12 1/3
	O2M 11/12 .25 1/6
	O3M 11/12 7/12 1/6
	Download AMC data (View Text File) Download CIF data (View Text File) Download diffraction data (View Text File) View JMOL 3-D Structure (permalink)
	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model with O3-O3-O3 angle = 240 and model oxygen radius = 1
	Note: Atoms Mg, Si, and O are assigned to atomic positions for convenience
	_database_code_amcsd 0003471
	7.394 6 3.464 90 117.9 90 C2/c
	atom x y z
	Mg1 0 11/12 1/4
	Mg2 0 .25 1/4
	Si 5/16 1/12 19/48
	O1 1/8 1/12 5/24
	O2 3/8 .25 7/24
	O3 3/8 11/12 7/24
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model with O3-O3-O3 angle = 220 and model oxygen radius = 1
	Note: Atoms Mg, Si, and O are assigned to atomic positions for convenience
	_database_code_amcsd 0003472
	7.565 6.510 3.759 90 115.8 90 C2/c
	atom x y z
	Mg1 0 11/12 1/4
	Mg2 0 .25 1/4
	Si .3100 1/12 .3551
	O1 .1301 1/12 .1974
	O2 .3699 .25 .3026
	O3 .3699 -.0525 .2101
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model with O3-O3-O3 angle = 200 and model oxygen radius = 1
	Note: Atoms Mg, Si, and O are assigned to atomic positions for convenience
	_database_code_amcsd 0003473
	7.608 6.823 3.939 90 113.4 90 C2/c
	atom x y z
	Mg1 0 11/12 1/4
	Mg2 0 .25 1/4
	Si .3085 1/12 .3204
	O1 .1330 1/12 .1856
	O2 .3670 .25 .3144
	O3 .3670 -.0255 .1408
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model with O3-O3-O3 angle = 180 and model oxygen radius = 1
	Note: Atoms Mg, Si, and O are assigned to atomic positions for convenience
	_database_code_amcsd 0003474
	7.526 6.928 4 90 110.8 90 C2/c
	atom x y z
	Mg1 0 11/12 1/4
	Mg2 0 .25 1/4
	Si .3080 1/12 .2887
	O1 .1340 1/12 .1726
	O2 .3660 .25 .3274
	O3 .3660 0 .0774
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model with O3-O3-O3 angle = 160 and model oxygen radius = 1
	Note: Atoms Mg, Si, and O are assigned to atomic positions for convenience
	_database_code_amcsd 0003475
	7.326 6.823 3.939 90 107.7 90 C2/c
	atom x y z
	Mg1 0 11/12 1/4
	Mg2 0 .25 1/4
	Si .3085 1/12 .2576
	O1 .1330 1/12 .1585
	O2 .3670 .25 .3415
	O3 .3670 .0255 .0152
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model with O3-O3-O3 angle = 140 and model oxygen radius = 1
	Note: Atoms Mg, Si, and O are assigned to atomic positions for convenience
	_database_code_amcsd 0003476
	7.023 6.510 3.759 90 104.1 90 C2/c
	atom x y z
	Mg1 0 11/12 1/4
	Mg2 0 .25 1/4
	Si .3100 1/12 .2248
	O1 .1301 1/12 .1427
	O2 .3699 .25 .3573
	O3 .3699 .0525 .9497
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model with O3-O3-O3 angle = 120 and model oxygen radius = 1
	Note: Atoms Mg, Si, and O are assigned to atomic positions for convenience
	_database_code_amcsd 0003477
	6.6332 6 3.464 90 100.0 90 C2/c
	atom x y z
	Mg1 0 11/12 1/4
	Mg2 0 .25 1/4
	Si 5/16 1/12 3/16
	O1 1/8 1/12 1/8
	O2 3/8 .25 3/8
	O3 3/8 1/12 7/8
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model diopside after Cameron et al. (1973)
	with O3-O3-O3 angle = 166.4 and model oxygen radius = 1.318
	_database_code_amcsd 0003478
	9.756 9.067 5.235 90 108.7 90 C2/c
	atom x y z
	Mg 0 11/12 1/4
	Ca 0 .25 1/4
	Si .3082 1/12 .2676
	O1 .1335 1/12 .1632
	O2 .3665 .25 .3368
	O3 .3665 .0172 .0352
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model diopside at 1000C after Cameron et al. (1973)
	with O3-O3-O3 angle = 168.5 and model oxygen radius = 1.330
	_database_code_amcsd 0003479
	9.876 9.170 5.294 90 109.0 90 C2/c
	atom x y z
	Mg 0 11/12 1/4
	Ca 0 .25 1/4
	Si .3082 1/12 .2709
	O1 .1337 1/12 .1647
	O2 .3663 .25 .3353
	O3 .3663 .0145 .0419
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model diopside after Levien and Prewitt (1981)
	with O3-O3-O3 angle = 166.4 and model oxygen radius = 1.319
	_database_code_amcsd 0003480
	9.760 9.071 5.237 90 108.7 90 C2/c
	atom x y z
	Mg 0 11/12 1/4
	Ca 0 .25 1/4
	Si .3082 1/12 .2676
	O1 .1335 1/12 .1631
	O2 .3664 .25 .3369
	O3 .3664 .0172 .0351
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model diopside at 5.3 GPa after Levien and Prewitt (1981)
	with O3-O3-O3 angle = 163.6 and model oxygen radius = 1.304
	_database_code_amcsd 0003481
	9.607 8.939 5.161 90 108.3 90 C2/c
	atom x y z
	Mg 0 11/12 1/4
	Ca 0 .25 1/4
	Si .3083 1/12 .2632
	O1 .1333 1/12 .1611
	O2 .3667 .25 .3389
	O3 .3667 .0208 .0264
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model ferrosilite at 1.87 GPa after Hugh-Jones et al. (1995)
	with O3-O3-O3 angle = 138.3 and model oxygen radius = 1.366
	_database_code_amcsd 0003482
	9.552 8.844 5.106 90 103.8 90 C2/c
	atom x y z
	Fe 0 11/12 1/4
	Fe 0 .25 1/4
	Si .3101 1/12 .2219
	O1 .1298 1/12 .1413
	O2 .3702 .25 .3587
	O3 .3702 .0550 .9438
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model kosmochlor after Cameron et al. (1973)
	with O3-O3-O3 angle = 172.0 and model oxygen radius = 1.294
	_database_code_amcsd 0003483
	9.653 8.944 5.164 90 109.6 90 C2/c
	atom x y z
	Cr 0 11/12 1/4
	Na 0 .25 1/4
	Si .3081 1/12 .2763
	O1 .1338 1/12 .1672
	O2 .3662 .25 .3328
	O3 .3662 .0100 .0527
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model kosmochlor at 600C after Cameron et al. (1973)
	with O3-O3-O3 angle = 172.9 and model oxygen radius = 1.299
	_database_code_amcsd 0003484
	9.697 8.980 5.184 90 109.7 90 C2/c
	atom x y z
	Cr 0 11/12 1/4
	Na 0 .25 1/4
	Si .3081 1/12 .2776
	O1 .1339 1/12 .1677
	O2 .3661 .25 .3323
	O3 .3661 .0090 .0552
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model kosmochlor after Origlieri et al. (2003)
	with O3-O3-O3 angle = 172.8 and model oxygen radius = 1.292
	_database_code_amcsd 0003485
	9.650 8.937 5.160 90 109.7 90 C2/c
	atom x y z
	Cr 0 11/12 1/4
	Na 0 .25 1/4
	Si .3081 1/12 .2775
	O1 .1339 1/12 .1677
	O2 .3661 .25 .3323
	O3 .3661 .0091 .0550
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model kosmochlor at 9.28 GPa after Origlieri et al. (2003)
	with O3-O3-O3 angle = 166.1 and model oxygen radius = 1.271
	_database_code_amcsd 0003486
	9.401 8.738 5.045 90 108.7 90 C2/c
	atom x y z
	Cr 0 11/12 1/4
	Na 0 .25 1/4
	Si .3082 1/12 .2672
	O1 .1335 1/12 .1630
	O2 .3665 .25 .3370
	O3 .3665 .0180 .0343
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model spodumene after Cameron et al. (1973)
	with O3-O3-O3 angle = 189.5 and model oxygen radius = 1.263
	_database_code_amcsd 0003487
	9.570 8.717 5.033 90 112.1 90 C2/c
	atom x y z
	Al 0 11/12 1/4
	Li 0 .25 1/4
	Si .3081 1/12 .3035
	O1 .1337 1/12 .1789
	O2 .3662 .25 .3211
	O3 .3662 -.0120 .1070
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model spodumene at 760C after Cameron et al. (1973)
	with O3-O3-O3 angle = 186.6 and model oxygen radius = 1.267
	_database_code_amcsd 0003488
	9.589 8.766 5.061 90 111.7 90 C2/c
	atom x y z
	Al 0 11/12 1/4
	Li 0 .25 1/4
	Si .3081 1/12 .2989
	O1 .1339 1/12 .1770
	O2 .3661 .25 .3230
	O3 .3661 -.0083 .0979
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	Pyroxene-ideal
	Thompson R M, Downs R T
	American Mineralogist 89 (2004) 614-628
	Model pyroxenes II: Structural variation as a function of tetrahedral rotation
	model spodumene after Arlt and Angel (2003)
	with O3-O3-O3 angle = 189.9 and model oxygen radius = 1.263
	_database_code_amcsd 0003489
	9.572 8.715 5.032 90 112.1 90 C2/c
	atom x y z
	Al 0 11/12 1/4
	Li 0 .25 1/4
	Si .3081 1/12 .3041
	O1 .1337 1/12 .1792
	O2 .3663 .25 .3208
	O3 .3663 -.0124 .1082
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