#------------------------------------------------------------------------------
#$Date: 2008-01-26 15:05:32 +0200 (Sat, 26 Jan 2008) $
#$Revision: 19 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/9008297.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_9008297
_chemical_name 'Talc'
loop_
_publ_author_name
'Perdikatsis B'
'Burzlaff H'
_journal_name_full "Zeitschrift fur Kristallographie"
_journal_volume 156
_journal_year 1981
_journal_page_first 177
_journal_page_last 186
_publ_section_title
;
 Strukturverfeinerung am talk Mg3[(OH)2Si4O10]
;
_chemical_formula_sum 'Si4 Mg3 O12 H2'
_cell_length_a 5.290
_cell_length_b 9.173
_cell_length_c 9.460
_cell_angle_alpha 90.46
_cell_angle_beta 98.68
_cell_angle_gamma 90.09
_cell_volume 453.774
_symmetry_space_group_name_H-M 'C -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'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_Uiso_or_equiv
Si1   0.24527   0.50259   0.29093 ?
Si2   0.24590   0.83587   0.29108 ?
Mg1   0.00000   0.00000   0.00000 ?
Mg2   0.50012   0.83332   0.99994 ?
O1   0.19910   0.83440   0.11760 ?
O2   0.69700   0.66740   0.11260 ?
O3   0.19800   0.50120   0.11760 ?
O4   0.01990   0.92870   0.34810 ?
O5   0.52020   0.91090   0.34940 ?
O6   0.24290   0.66990   0.34840 ?
H   0.71900   0.66900   0.20300   0.00760