#------------------------------------------------------------------------------
#$Date: 2024-05-16 09:36:09 +0300 (Thu, 16 May 2024) $
#$Revision: 291877 $
#$URL: file:///home/coder/svn-repositories/cod/cif/9/01/21/9012180.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_9012180
loop_
_publ_author_name
'Knop, O.'
'Cameron, T. S.'
'Jochem, K.'
_publ_section_title
;
 What is the true space group of weberite?
 Sample: Imm2 refinement, T = 133 K
;
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              213
_journal_page_last               221
_journal_paper_doi               10.1016/0022-4596(82)90231-6
_journal_volume                  43
_journal_year                    1982
_chemical_compound_source        'Ivigtut, Greenland'
_chemical_formula_sum            'Al F7 Mg Na2'
_chemical_name_mineral           Weberite
_space_group_IT_number           44
_symmetry_space_group_name_Hall  'I 2 -2'
_symmetry_space_group_name_H-M   'I m m 2'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   7.050
_cell_length_b                   9.979
_cell_length_c                   7.297
_cell_formula_units_Z            4
_cell_volume                     513.358
_database_code_amcsd             0013480
_diffrn_ambient_temperature      133
_exptl_crystal_density_diffrn    2.979
_cod_original_formula_sum        'Na2 Mg Al F7'
_cod_database_code               9012180
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
Na1 0.24980 0.00000 0.49640
Na2 0.00000 0.25330 0.74790
Mg 0.24880 0.00000 0.00000
Al 0.00000 0.25120 0.24910
F1 0.00000 0.00000 0.89030
F2 0.00000 0.50000 0.61770
F3 0.00000 0.16500 0.47520
F4 0.00000 0.33630 0.02390
F5 0.18620 0.13720 0.18450
F6 0.31730 0.13770 0.82360
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0013480
