data_global
_chemical_name_mineral 'Richterite'
loop_
_publ_author_name
'Gunter M E'
'Dyar M D'
'Twamley B'
'Foit F F'
'Cornelius S'
_journal_name_full 'American Mineralogist'
_journal_volume 88 
_journal_year 2003
_journal_page_first 1970
_journal_page_last 1978
_publ_section_title
;
 Composition, Fe3+/Sum(Fe), and crystal structure of non-asbestiform and
 asbestiform amphiboles from Libby, Montana, U.S.A.
;
_database_code_amcsd 0003186
_chemical_formula_sum 'Si7.96 Al.06 Mg4.46 Fe.52 Mn.04 Ca1.12 Na1.12 K.2 O24 H2'
_cell_length_a 9.8787
_cell_length_b 18.024
_cell_length_c 5.2875
_cell_angle_alpha 90
_cell_angle_beta 104.377
_cell_angle_gamma 90
_cell_volume 911.975
_exptl_crystal_density_diffrn      3.020
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,z'
  '1/2+x,1/2-y,z'
  '-x,y,-z'
  '1/2-x,1/2+y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
SiT(1)   0.27910   0.08480   0.29600   0.99500   0.01100
AlT(1)   0.27910   0.08480   0.29600   0.00500   0.01100
SiT(2)   0.28720   0.17140   0.80310   0.99500   0.01100
AlT(2)   0.28720   0.17140   0.80310   0.00500   0.01100
MgM(1)   0.00000   0.08860   0.50000   0.99000   0.00900
AlM(1)   0.00000   0.08860   0.50000   0.01000   0.00900
MgM(2)   0.00000   0.17960   0.00000   0.82000   0.01000
FeM(2)   0.00000   0.17960   0.00000   0.18000   0.01000
MgM(3)   0.00000   0.00000   0.00000   0.84000   0.02000
FeM(3)   0.00000   0.00000   0.00000   0.16000   0.02000
MnM(4)   0.00000   0.27720   0.50000   0.02000   0.01800
CaM(4)   0.00000   0.27720   0.50000   0.56000   0.01800
NaM(4)   0.00000   0.27720   0.50000   0.42000   0.01800
NaA   0.00000   0.50000   0.00000   0.28000   0.10500
KA   0.00000   0.50000   0.00000   0.20000   0.10500
O(1)   0.11130   0.08650   0.21660   1.00000   0.01300
O(2)   0.11860   0.17020   0.72690   1.00000   0.01400
O(3)   0.10810   0.00000   0.71380   1.00000   0.01400
O(4)   0.36340   0.24870   0.79560   1.00000   0.01500
O(5)   0.34590   0.13150   0.09220   1.00000   0.01500
O(6)   0.34190   0.11820   0.58770   1.00000   0.01400
O(7)   0.33640   0.00000   0.29350   1.00000   0.01600
H   0.21480   0.00000   0.77500   1.00000   0.03000
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
SiT(1) 0.01500 0.01100 0.00800 0.00000 0.00500 -0.00100
AlT(1) 0.01500 0.01100 0.00800 0.00000 0.00500 -0.00100
SiT(2) 0.01500 0.01200 0.00700 -0.00100 0.00400 0.00000
AlT(2) 0.01500 0.01200 0.00700 -0.00100 0.00400 0.00000
MgM(1) 0.01300 0.00900 0.00500 0.00000 0.00300 0.00000
AlM(1) 0.01300 0.00900 0.00500 0.00000 0.00300 0.00000
MgM(2) 0.01200 0.01100 0.00700 0.00000 0.00400 0.00000
FeM(2) 0.01200 0.01100 0.00700 0.00000 0.00400 0.00000
MgM(3) 0.02600 0.02000 0.01600 0.00000 0.00700 0.00000
FeM(3) 0.02600 0.02000 0.01600 0.00000 0.00700 0.00000
MnM(4) 0.02400 0.01600 0.01800 0.00000 0.01200 0.00000
CaM(4) 0.02400 0.01600 0.01800 0.00000 0.01200 0.00000
NaM(4) 0.02400 0.01600 0.01800 0.00000 0.01200 0.00000
NaA 0.12700 0.05800 0.18800 0.00000 0.14700 0.00000
KA 0.12700 0.05800 0.18800 0.00000 0.14700 0.00000
O(1) 0.01700 0.01300 0.00800 -0.00100 0.00400 -0.00100
O(2) 0.01700 0.01500 0.01100 -0.00100 0.00500 -0.00100
O(3) 0.01800 0.01600 0.01000 0.00000 0.00600 0.00000
O(4) 0.02000 0.01500 0.00900 -0.00400 0.00500 -0.00100
O(5) 0.01800 0.01800 0.01000 0.00000 0.00500 0.00400
O(6) 0.01700 0.01500 0.01100 -0.00100 0.00400 -0.00200
O(7) 0.01300 0.01600 0.01600 0.00000 0.00400 0.00000