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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/9/00/09/9000900.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_9000900
loop_
_publ_author_name
'Cameron, M.'
'Sueno, S.'
'Papike, J. J.'
'Prewitt, C. T.'
_publ_section_title
;
 High temperature crystal chemistry of K and Na fluor-richterites
 K fluor-richterite  600C
;
_journal_name_full               'American Mineralogist'
_journal_page_first              924
_journal_page_last               943
_journal_volume                  68
_journal_year                    1983
_chemical_formula_sum            'Ca2 F2 K2 Mg5 Na2 O22 Si8'
_chemical_name_mineral           Fluororichterite
_space_group_IT_number           12
_symmetry_space_group_name_Hall  '-I 2y'
_symmetry_space_group_name_H-M   'I 1 2/m 1'
_cell_angle_alpha                90
_cell_angle_beta                 105.83
_cell_angle_gamma                90
_cell_length_a                   10.070
_cell_length_b                   18.106
_cell_length_c                   5.278
_cell_formula_units_Z            2
_cell_volume                     925.828
_database_code_amcsd             0000919
_diffrn_ambient_temperature      873.15
_exptl_crystal_density_diffrn    3.374
_cod_original_formula_sum        'Si8 Mg5 (Na2 Ca2) K2 O22 F2'
_cod_database_code               9000900
loop_
_space_group_symop_operation_xyz
x,y,z
1/2+x,1/2+y,1/2+z
x,-y,z
1/2+x,1/2-y,1/2+z
-x,y,-z
1/2-x,1/2+y,1/2-z
-x,-y,-z
1/2-x,1/2-y,1/2-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Si1 0.27535 0.91553 0.97689
Si2 0.28512 0.82913 0.48056
Mg1 0.00000 0.91004 0.50000
Mg2 0.00000 0.81969 0.00000
Mg3 0.00000 0.00000 0.00000
Na 0.00000 0.72173 0.50000
Ca 0.00000 0.72173 0.50000
K 0.47591 0.00000 0.52685
O1 0.11045 0.91472 0.89143
O2 0.11865 0.83085 0.39228
F3 0.10255 0.00000 0.38740
O4 0.36150 0.75314 0.55935
O5 0.34323 0.87167 0.25022
O6 0.33956 0.88191 0.75179
O7 0.33308 0.00000 0.02869
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0000919
