data_9012193
_publ_section_title
;
 Crystal structures of tungsten disulfide and diselenide
;
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              207
_journal_page_last               209
_journal_paper_doi               10.1016/0022-4596(87)90057-0
_journal_volume                  70
_journal_year                    1987
_chemical_formula_sum            'Se2 W'
_chemical_name_mineral           WSe2
_space_group_IT_number           194
_symmetry_space_group_name_Hall  '-P 6c 2c'
_symmetry_space_group_name_H-M   'P 63/m m c'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   3.282
_cell_length_b                   3.282
_cell_length_c                   12.96
_cell_volume                     120.896
_exptl_crystal_density_diffrn    9.389
_[local]_cod_chemical_formula_sum_orig 'W Se2'
_cod_database_code               9012193
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,-x+y,1/2+z
x,x-y,1/2-z
-x+y,-x,1/2-z
x-y,x,1/2+z
-y,-x,z
y,x,-z
y,-x+y,-z
-y,x-y,z
x-y,-y,1/2+z
-x+y,y,1/2-z
x,y,1/2-z
-x,-y,1/2+z
x,x-y,z
-x,-x+y,-z
x-y,x,-z
-x+y,-x,z
y,x,1/2+z
-y,-x,1/2-z
-y,x-y,1/2-z
y,-x+y,1/2+z
-x+y,y,z
x-y,-y,-z
-x,-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
W 0.33333 0.66667 0.25000
Se 0.33333 0.66667 0.62110
