The structure described by CeSe2 is quartz (beta) structured and crystallizes in the hexagonal P6_222 space group. Ce(1) is bonded to four equivalent Se(1) atoms to form corner-sharing CeSe4 tetrahedra. Se(1) is bonded in a linear 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   8.706
_cell_length_b   8.706
_cell_length_c   9.551
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   626.918
_cell_formula_units_Z   3
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  0.500  0.500  0.833  1.0
  Ce  Ce1  1  0.500  0.000  0.500  1.0
  Ce  Ce2  1  0.000  0.500  0.167  1.0
  Se  Se3  1  0.232  0.768  0.333  1.0
  Se  Se4  1  0.232  0.463  0.000  1.0
  Se  Se5  1  0.537  0.768  0.667  1.0
  Se  Se6  1  0.768  0.232  0.333  1.0
  Se  Se7  1  0.768  0.537  0.000  1.0
  Se  Se8  1  0.463  0.232  0.667  1.0
[/CIF]
.
The structure described by CeSe2 is quartz (beta) structured and crystallizes in the hexagonal P6_222 space group. Ce(1) is bonded to four equivalent Se(1) atoms to form corner-sharing CeSe4 tetrahedra. Se(1) is bonded in a linear 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   8.706
_cell_length_b   8.706
_cell_length_c   9.551
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   626.918
_cell_formula_units_Z   3
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  0.500  0.500  0.833  1.0
  Ce  Ce1  1  0.500  0.000  0.500  1.0
  Ce  Ce2  1  0.000  0.500  0.167  1.0
  Se  Se3  1  0.232  0.768  0.333  1.0
  Se  Se4  1  0.232  0.463  0.000  1.0
  Se  Se5  1  0.537  0.768  0.667  1.0
  Se  Se6  1  0.768  0.232  0.333  1.0
  Se  Se7  1  0.768  0.537  0.000  1.0
  Se  Se8  1  0.463  0.232  0.667  1.0
[/CIF]
.