#------------------------------------------------------------------------------
#$Date: 2008-01-14 00:15:36 +0200 (Mon, 14 Jan 2008) $
#$Revision: 14 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9003097.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_9003097
_chemical_name '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.
;
_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
_symmetry_space_group_name_H-M 'C 1 2/m 1'
loop_
_symmetry_equiv_pos_as_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_Uiso_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