#------------------------------------------------------------------------------
#$Date: 2024-04-18 16:56:43 +0100 (Thu, 18 Apr 2024) $
#$Revision: 291269 $
#$URL: svn://www.crystallography.net/cod/cif/9/00/02/9000252.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_9000252
loop_
_publ_author_name
'Wiegers, G. A.'
_publ_section_title
;
 The crystal structure of the low-temperature form of silver selenide
;
_journal_name_full               'American Mineralogist'
_journal_page_first              1882
_journal_page_last               1888
_journal_volume                  56
_journal_year                    1971
_chemical_formula_sum            'Ag2 Se'
_chemical_name_mineral           Naumannite
_symmetry_space_group_name_H-M   'P 21 21 21'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_length_a                   4.333
_cell_length_b                   7.062
_cell_length_c                   7.764
_cell_formula_units_Z            4
_cell_volume                     237.576
_database_code_amcsd             0000262
_exptl_crystal_density_diffrn    8.239
_cod_database_code               9000252
loop_
_space_group_symop_operation_xyz
x,y,z
1/2-x,1/2+y,1/2-z
1/2+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
_atom_site_U_iso_or_equiv
Ag1 0.10700 0.36900 0.45600 0.00950
Ag2 0.72800 0.02900 0.36100 0.00950
Se 0.35800 0.23500 0.14900 0.00950
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 AMCSD 0000262