The material described by CeSe2 is Low Tridymite-like structured and crystallizes in the monoclinic C2/c space group. Ce(1) is bonded to one Se(1), one Se(3), and two equivalent Se(2) atoms to form corner-sharing CeSe4 tetrahedra. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a linear geometry to two equivalent Ce(1) atoms. In the second Se site, Se(2) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms. In the third Se site, Se(3) 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   8.429
_cell_length_b   8.429
_cell_length_c   14.827
_cell_angle_alpha   68.077
_cell_angle_beta   68.077
_cell_angle_gamma   56.458
_symmetry_Int_Tables_number   1
_cell_volume   795.357
_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  0.059  0.316  0.687  1.0
  Ce  Ce1  1  0.684  0.941  0.813  1.0
  Ce  Ce2  1  0.941  0.684  0.313  1.0
  Ce  Ce3  1  0.316  0.059  0.187  1.0
  Se  Se4  1  0.500  0.000  0.000  1.0
  Se  Se5  1  0.000  0.500  0.500  1.0
  Se  Se6  1  0.188  0.432  0.189  1.0
  Se  Se7  1  0.568  0.812  0.311  1.0
  Se  Se8  1  0.812  0.568  0.811  1.0
  Se  Se9  1  0.432  0.188  0.689  1.0
  Se  Se10  1  0.992  0.008  0.750  1.0
  Se  Se11  1  0.008  0.992  0.250  1.0
[/CIF]
.
The material described by CeSe2 is Low Tridymite-like structured and crystallizes in the monoclinic C2/c space group. Ce(1) is bonded to one Se(1), one Se(3), and two equivalent Se(2) atoms to form corner-sharing CeSe4 tetrahedra. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded in a linear geometry to two equivalent Ce(1) atoms. In the second Se site, Se(2) is bonded in a bent 150 degrees geometry to two equivalent Ce(1) atoms. In the third Se site, Se(3) 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   8.429
_cell_length_b   8.429
_cell_length_c   14.827
_cell_angle_alpha   68.077
_cell_angle_beta   68.077
_cell_angle_gamma   56.458
_symmetry_Int_Tables_number   1
_cell_volume   795.357
_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  0.059  0.316  0.687  1.0
  Ce  Ce1  1  0.684  0.941  0.813  1.0
  Ce  Ce2  1  0.941  0.684  0.313  1.0
  Ce  Ce3  1  0.316  0.059  0.187  1.0
  Se  Se4  1  0.500  0.000  0.000  1.0
  Se  Se5  1  0.000  0.500  0.500  1.0
  Se  Se6  1  0.188  0.432  0.189  1.0
  Se  Se7  1  0.568  0.812  0.311  1.0
  Se  Se8  1  0.812  0.568  0.811  1.0
  Se  Se9  1  0.432  0.188  0.689  1.0
  Se  Se10  1  0.992  0.008  0.750  1.0
  Se  Se11  1  0.008  0.992  0.250  1.0
[/CIF]
.