The structure described by CeSe2 is low (alpha) Cristobalite-like structured and crystallizes in the cubic Ia-3d space group. Ce(1) is bonded to four equivalent Se(1) atoms to form corner-sharing CeSe4 tetrahedra. Se(1) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms. is represented by the CIF file [CIF]
data_CeSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.837
_cell_length_b   14.837
_cell_length_c   14.837
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   2514.407
_cell_formula_units_Z   12
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ce  Ce0  1  0.125  0.875  0.750  1.0
  Ce  Ce1  1  0.375  0.625  0.250  1.0
  Ce  Ce2  1  0.250  0.125  0.375  1.0
  Ce  Ce3  1  0.750  0.375  0.125  1.0
  Ce  Ce4  1  0.625  0.750  0.875  1.0
  Ce  Ce5  1  0.875  0.250  0.625  1.0
  Ce  Ce6  1  0.875  0.125  0.250  1.0
  Ce  Ce7  1  0.625  0.375  0.750  1.0
  Ce  Ce8  1  0.750  0.875  0.625  1.0
  Ce  Ce9  1  0.250  0.625  0.875  1.0
  Ce  Ce10  1  0.375  0.250  0.125  1.0
  Ce  Ce11  1  0.125  0.750  0.375  1.0
  Se  Se12  1  0.907  0.593  0.250  1.0
  Se  Se13  1  0.593  0.343  0.187  1.0
  Se  Se14  1  0.157  0.907  0.313  1.0
  Se  Se15  1  0.343  0.157  0.250  1.0
  Se  Se16  1  0.750  0.343  0.657  1.0
  Se  Se17  1  0.813  0.157  0.407  1.0
  Se  Se18  1  0.687  0.593  0.843  1.0
  Se  Se19  1  0.750  0.907  0.093  1.0
  Se  Se20  1  0.343  0.687  0.093  1.0
  Se  Se21  1  0.593  0.750  0.407  1.0
  Se  Se22  1  0.157  0.750  0.843  1.0
  Se  Se23  1  0.907  0.813  0.657  1.0
  Se  Se24  1  0.093  0.407  0.750  1.0
  Se  Se25  1  0.407  0.657  0.813  1.0
  Se  Se26  1  0.843  0.093  0.687  1.0
  Se  Se27  1  0.657  0.843  0.750  1.0
  Se  Se28  1  0.250  0.657  0.343  1.0
  Se  Se29  1  0.187  0.843  0.593  1.0
  Se  Se30  1  0.313  0.407  0.157  1.0
  Se  Se31  1  0.250  0.093  0.907  1.0
  Se  Se32  1  0.657  0.313  0.907  1.0
  Se  Se33  1  0.407  0.250  0.593  1.0
  Se  Se34  1  0.843  0.250  0.157  1.0
  Se  Se35  1  0.093  0.187  0.343  1.0
[/CIF]
.
The structure described by CeSe2 is low (alpha) Cristobalite-like structured and crystallizes in the cubic Ia-3d space group. Ce(1) is bonded to four equivalent Se(1) atoms to form corner-sharing CeSe4 tetrahedra. Se(1) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms. is represented by the CIF file [CIF]
data_CeSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.837
_cell_length_b   14.837
_cell_length_c   14.837
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   2514.407
_cell_formula_units_Z   12
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ce  Ce0  1  0.125  0.875  0.750  1.0
  Ce  Ce1  1  0.375  0.625  0.250  1.0
  Ce  Ce2  1  0.250  0.125  0.375  1.0
  Ce  Ce3  1  0.750  0.375  0.125  1.0
  Ce  Ce4  1  0.625  0.750  0.875  1.0
  Ce  Ce5  1  0.875  0.250  0.625  1.0
  Ce  Ce6  1  0.875  0.125  0.250  1.0
  Ce  Ce7  1  0.625  0.375  0.750  1.0
  Ce  Ce8  1  0.750  0.875  0.625  1.0
  Ce  Ce9  1  0.250  0.625  0.875  1.0
  Ce  Ce10  1  0.375  0.250  0.125  1.0
  Ce  Ce11  1  0.125  0.750  0.375  1.0
  Se  Se12  1  0.907  0.593  0.250  1.0
  Se  Se13  1  0.593  0.343  0.187  1.0
  Se  Se14  1  0.157  0.907  0.313  1.0
  Se  Se15  1  0.343  0.157  0.250  1.0
  Se  Se16  1  0.750  0.343  0.657  1.0
  Se  Se17  1  0.813  0.157  0.407  1.0
  Se  Se18  1  0.687  0.593  0.843  1.0
  Se  Se19  1  0.750  0.907  0.093  1.0
  Se  Se20  1  0.343  0.687  0.093  1.0
  Se  Se21  1  0.593  0.750  0.407  1.0
  Se  Se22  1  0.157  0.750  0.843  1.0
  Se  Se23  1  0.907  0.813  0.657  1.0
  Se  Se24  1  0.093  0.407  0.750  1.0
  Se  Se25  1  0.407  0.657  0.813  1.0
  Se  Se26  1  0.843  0.093  0.687  1.0
  Se  Se27  1  0.657  0.843  0.750  1.0
  Se  Se28  1  0.250  0.657  0.343  1.0
  Se  Se29  1  0.187  0.843  0.593  1.0
  Se  Se30  1  0.313  0.407  0.157  1.0
  Se  Se31  1  0.250  0.093  0.907  1.0
  Se  Se32  1  0.657  0.313  0.907  1.0
  Se  Se33  1  0.407  0.250  0.593  1.0
  Se  Se34  1  0.843  0.250  0.157  1.0
  Se  Se35  1  0.093  0.187  0.343  1.0
[/CIF]
.