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#$Date: 2024-04-18 18:56:43 +0300 (Thu, 18 Apr 2024) $
#$Revision: 291269 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/00/08/9000844.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided the American Mineralogist Crystal Structure Database,
# http://rruff.geo.arizona.edu/AMS/amcsd.php
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_9000844
loop_
_publ_author_name
'Ohta, T.'
'Takeda, H.'
'Takeuchi, Y.'
_publ_section_title
;
 Mica polytypism: Similarities in the crystal structures of coexisting 1M and
 2M(1) oxybiotite
 Sample: in the 2M1 setting
;
_journal_name_full               'American Mineralogist'
_journal_page_first              298
_journal_page_last               310
_journal_volume                  67
_journal_year                    1982
_chemical_formula_sum            'Al3.3 Fe3.512 K2 Mg7.164 O48 Si5.68 Ti1.344'
_chemical_name_mineral           Biotite
_space_group_IT_number           12
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_cell_angle_alpha                90
_cell_angle_beta                 100.09
_cell_angle_gamma                90
_cell_length_a                   5.3183
_cell_length_b                   9.211
_cell_length_c                   10.105
_cell_formula_units_Z            1
_cell_volume                     487.356
_database_code_amcsd             0000863
_exptl_crystal_density_diffrn    5.211
_cod_original_formula_sum        'Mg7.164 Fe3.512 Al3.3 Ti1.344 Si5.68 K2 O48'
_cod_database_code               9000844
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
Mg1 -0.00005 -0.00005 0.50000 0.61200
Fe1 -0.00005 -0.00005 0.50000 0.20000
Al1 -0.00005 -0.00005 0.50000 0.18800
Mg2 0.00010 0.34513 0.50000 0.51300
Fe2 0.00010 0.34513 0.50000 0.29600
Ti2 0.00010 0.34513 0.50000 0.16800
Al2 0.00010 0.34513 0.50000 0.02300
Si1 0.07320 0.16733 0.22299 0.35600
Al1 0.07320 0.16733 0.22299 0.14000
Fe1 0.07320 0.16733 0.22299 0.00400
Si2 0.07310 0.16734 0.22286 0.35400
Al2 0.07310 0.16734 0.22286 0.13200
Fe2 0.07310 0.16734 0.22286 0.01400
K 0.00000 0.50000 0.00000 1.00000
O11 0.01670 0.00030 0.16710 1.00000
O21 0.32230 0.23150 0.16470 1.00000
O22 0.32210 0.23090 0.16510 1.00000
O31 0.12870 0.16980 0.39050 1.00000
O32 0.12880 0.16910 0.39070 1.00000
O4 0.13240 0.49980 0.40010 1.00000
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0000863
