Biotite
	Brigatti M F, Davoli P
	American Mineralogist 75 (1990) 305-313
	Crystal-structure refinement of 1M plutonic biotites
	sample M73 from a monzonite in the Valle del Cervo pluton
	_database_code_amcsd 0001297
	5.345 9.258 10.222 90 100.23 90 C2/m
	atom x y z occ B(1,1) B(2,2) B(3,3) B(1,2) B(1,3) B(2,3)
	Fe1 0 0 .5 0.0076 0.0020 0.0033 0 0.0016 0
	Mg2 0 .3347 .5 0.0061 0.0032 0.0030 0 0.0007 0
	K 0 .5 0 0.0255 0.0080 0.0080 0 0.0024 0
	Al .0748 .1669 .2257 .25 0.0058 0.0018 0.0025 -.0001 0.0007 -.0001
	Si .0748 .1669 .2257 .75 0.0058 0.0018 0.0025 -.0001 0.0007 -.0001
	O1 .0267 0 .1687 0.0224 0.0035 0.0033 0 0.0001 0
	O2 .3195 .2361 .1681 0.0141 0.0060 0.0034 -.0028 0.0017 -.0007
	O3 .1316 .1677 .3909 0.0086 0.0030 0.0027 .0003 0.0009 -.0003
	O4 .1291 .5 .3947 0.0076 0.0022 0.0047 0 0.0016 0
	H .09 .5 .315
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