#------------------------------------------------------------------------------
#$Date: 2018-09-27 07:13:35 +0300 (Thu, 27 Sep 2018) $
#$Revision: 211196 $
#$URL: file:///home/coder/svn-repositories/cod/cif/8/10/39/8103974.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_8103974
loop_
_publ_author_name
'Boettcher, P.'
'Roensch, E.'
'Getzschmann, J.'
_publ_section_title
;
 Crystal structure of dinatriumtetraselenide, Na2 Se4
;
_journal_name_full
;
Zeitschrift fuer Kristallographie - New Crystal Structures
;
_journal_page_first              87
_journal_page_last               87
_journal_volume                  212
_journal_year                    1997
_chemical_formula_sum            'Na2 Se4'
_space_group_IT_number           122
_symmetry_space_group_name_Hall  'I -4 2bw'
_symmetry_space_group_name_H-M   'I -4 2 d'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   10.1926
_cell_length_b                   10.1926
_cell_length_c                   12.2177
_cell_volume                     1269.286
_citation_journal_id_ASTM        ZKNSFT
_cod_data_source_file            Boettcher_ZKNSFT_1997_1965.cif
_cod_data_source_block           Na2Se4
_cod_database_code               8103974
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
y,-x,-z
-x,-y,z
-y,x,-z
x,-y+1/2,-z+1/4
-y+1/2,-x,z+3/4
-x,y+1/2,-z+1/4
y+1/2,x,z+3/4
x+1/2,y+1/2,z+1/2
y+1/2,-x+1/2,-z+1/2
-x+1/2,-y+1/2,z+1/2
-y+1/2,x+1/2,-z+1/2
x+1/2,-y+1,-z+3/4
-y+1,-x+1/2,z+5/4
-x+1/2,y+1,-z+3/4
y+1,x+1/2,z+5/4
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
Na1 Na+1 0 0 0.1825 1 0.0
Na2 Na+1 0.2604 0.25 0.125 1 0.0
Se1 Se 0.02113 0.26261 0.29471 1 0.0
Se2 Se 0.14096 0.1172 0.40646 1 0.0
