The structure described by CeSe2 is low (alpha) Cristobalite structured and crystallizes in the tetragonal P4_12_12 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 Crystallographic Information File (CIF) [CIF]
data_CeSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.501
_cell_length_b   8.501
_cell_length_c   11.841
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   855.616
_cell_formula_units_Z   4
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  0.800  0.200  0.750  1.0
  Ce  Ce1  1  0.200  0.800  0.250  1.0
  Ce  Ce2  1  0.700  0.700  0.500  1.0
  Ce  Ce3  1  0.300  0.300  0.000  1.0
  Se  Se4  1  0.745  0.401  0.576  1.0
  Se  Se5  1  0.255  0.599  0.076  1.0
  Se  Se6  1  0.901  0.755  0.326  1.0
  Se  Se7  1  0.099  0.245  0.826  1.0
  Se  Se8  1  0.599  0.255  0.924  1.0
  Se  Se9  1  0.401  0.745  0.424  1.0
  Se  Se10  1  0.755  0.901  0.674  1.0
  Se  Se11  1  0.245  0.099  0.174  1.0
[/CIF]
.
The structure described by CeSe2 is low (alpha) Cristobalite structured and crystallizes in the tetragonal P4_12_12 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 Crystallographic Information File (CIF) [CIF]
data_CeSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.501
_cell_length_b   8.501
_cell_length_c   11.841
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   855.616
_cell_formula_units_Z   4
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  0.800  0.200  0.750  1.0
  Ce  Ce1  1  0.200  0.800  0.250  1.0
  Ce  Ce2  1  0.700  0.700  0.500  1.0
  Ce  Ce3  1  0.300  0.300  0.000  1.0
  Se  Se4  1  0.745  0.401  0.576  1.0
  Se  Se5  1  0.255  0.599  0.076  1.0
  Se  Se6  1  0.901  0.755  0.326  1.0
  Se  Se7  1  0.099  0.245  0.826  1.0
  Se  Se8  1  0.599  0.255  0.924  1.0
  Se  Se9  1  0.401  0.745  0.424  1.0
  Se  Se10  1  0.755  0.901  0.674  1.0
  Se  Se11  1  0.245  0.099  0.174  1.0
[/CIF]
.