The material structure described by Ce2O2FeSe2 crystallizes in the monoclinic C2/m space group. Ce(1) is bonded in a 3-coordinate geometry to five equivalent Se(1) and three equivalent O(1) atoms. Fe(1) is bonded in a distorted linear geometry to four equivalent Se(1) and two equivalent O(1) atoms. Se(1) is bonded in a 7-coordinate geometry to five equivalent Ce(1) and two equivalent Fe(1) atoms. O(1) is bonded to three equivalent Ce(1) and one Fe(1) atom to form a mixture of edge and corner-sharing OCe3Fe tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce2Fe(SeO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.047
_cell_length_b   6.047
_cell_length_c   7.159
_cell_angle_alpha   60.214
_cell_angle_beta   60.214
_cell_angle_gamma   37.827
_symmetry_Int_Tables_number   1
_cell_volume   136.604
_cell_formula_units_Z   1
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  0.309  0.309  0.242  1.0
  Ce  Ce1  1  0.691  0.691  0.758  1.0
  Fe  Fe2  1  0.500  0.500  0.500  1.0
  Se  Se3  1  0.060  0.060  0.176  1.0
  Se  Se4  1  0.940  0.940  0.824  1.0
  O  O5  1  0.302  0.302  0.581  1.0
  O  O6  1  0.698  0.698  0.419  1.0
[/CIF]
.
The material structure described by Ce2O2FeSe2 crystallizes in the monoclinic C2/m space group. Ce(1) is bonded in a 3-coordinate geometry to five equivalent Se(1) and three equivalent O(1) atoms. Fe(1) is bonded in a distorted linear geometry to four equivalent Se(1) and two equivalent O(1) atoms. Se(1) is bonded in a 7-coordinate geometry to five equivalent Ce(1) and two equivalent Fe(1) atoms. O(1) is bonded to three equivalent Ce(1) and one Fe(1) atom to form a mixture of edge and corner-sharing OCe3Fe tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce2Fe(SeO)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.047
_cell_length_b   6.047
_cell_length_c   7.159
_cell_angle_alpha   60.214
_cell_angle_beta   60.214
_cell_angle_gamma   37.827
_symmetry_Int_Tables_number   1
_cell_volume   136.604
_cell_formula_units_Z   1
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  0.309  0.309  0.242  1.0
  Ce  Ce1  1  0.691  0.691  0.758  1.0
  Fe  Fe2  1  0.500  0.500  0.500  1.0
  Se  Se3  1  0.060  0.060  0.176  1.0
  Se  Se4  1  0.940  0.940  0.824  1.0
  O  O5  1  0.302  0.302  0.581  1.0
  O  O6  1  0.698  0.698  0.419  1.0
[/CIF]
.