#------------------------------------------------------------------------------
#$Date: 2024-04-18 18:56:43 +0300 (Thu, 18 Apr 2024) $
#$Revision: 291269 $
#$URL: svn://www.crystallography.net/cod/cif/9/00/08/9000822.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_9000822
loop_
_publ_author_name
'Stohl, F. V.'
'Smith, D. K.'
_publ_section_title
;
 The crystal chemistry of the uranyl silicate minerals
;
_journal_name_full               'American Mineralogist'
_journal_page_first              610
_journal_page_last               625
_journal_volume                  66
_journal_year                    1981
_chemical_compound_source        'Anderson mine, Yavapai County, Arizona, USA'
_chemical_formula_sum            'O7 Si U'
_chemical_name_mineral           Weeksite
_space_group_IT_number           38
_symmetry_space_group_name_Hall  'A 2 -2'
_symmetry_space_group_name_H-M   'A m m 2'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   7.106
_cell_length_b                   17.900
_cell_length_c                   7.087
_cell_formula_units_Z            4
_cell_volume                     901.448
_database_code_amcsd             0000839
_exptl_crystal_density_diffrn    2.786
_cod_original_formula_sum        'U Si O7'
_cod_database_code               9000822
loop_
_space_group_symop_operation_xyz
x,y,z
x,1/2+y,1/2+z
x,-y,z
x,1/2-y,1/2+z
-x,y,z
-x,1/2+y,1/2+z
-x,-y,z
-x,1/2-y,1/2+z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
U1 0.00000 0.19800 0.00000
Si 0.00000 0.13000 0.52300
O1 0.25000 0.30700 0.54600
O2 0.00000 0.18000 0.69300
O2b 0.00000 0.18000 0.30700
O3 0.19400 0.07100 0.48700
O4 0.00000 0.42900 0.47300
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0000839
