The crystal structure described by Na(Ce2Se3)4 crystallizes in the tetragonal I-42d space group. Na(1) is bonded to four equivalent Se(2) and four equivalent Se(3) atoms to form distorted NaSe8 hexagonal bipyramids that share corners with eight equivalent Ce(1)Se8 hexagonal bipyramids, edges with four equivalent Ce(2)Se8 hexagonal bipyramids, faces with four equivalent Ce(1)Se8 hexagonal bipyramids, and faces with four equivalent Ce(3)Se8 hexagonal bipyramids. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Se(2), three equivalent Se(1), and three equivalent Se(3) atoms to form distorted CeSe8 hexagonal bipyramids that share corners with two equivalent Na(1)Se8 hexagonal bipyramids, corners with two equivalent Ce(1)Se8 hexagonal bipyramids, corners with two equivalent Ce(2)Se8 hexagonal bipyramids, corners with two equivalent Ce(3)Se8 hexagonal bipyramids,  an edgeedge with one Ce(3)Se8 hexagonal bipyramid, edges with three equivalent Ce(1)Se8 hexagonal bipyramids,  a faceface with one Na(1)Se8 hexagonal bipyramid, faces with two equivalent Ce(1)Se8 hexagonal bipyramids, faces with two equivalent Ce(3)Se8 hexagonal bipyramids, and faces with three equivalent Ce(2)Se8 hexagonal bipyramids. In the second Ce site, Ce(2) is bonded to two equivalent Se(2), two equivalent Se(3), and four equivalent Se(1) atoms to form distorted CeSe8 hexagonal bipyramids that share corners with four equivalent Ce(1)Se8 hexagonal bipyramids, corners with four equivalent Ce(3)Se8 hexagonal bipyramids, edges with two equivalent Na(1)Se8 hexagonal bipyramids, edges with two equivalent Ce(2)Se8 hexagonal bipyramids, faces with two equivalent Ce(3)Se8 hexagonal bipyramids, and faces with six equivalent Ce(1)Se8 hexagonal bipyramids. In the third Ce site, Ce(3) is bonded to two equivalent Se(1), two equivalent Se(3), and four equivalent Se(2) atoms to form distorted CeSe8 hexagonal bipyramids that share corners with four equivalent Ce(1)Se8 hexagonal bipyramids, corners with four equivalent Ce(2)Se8 hexagonal bipyramids, edges with two equivalent Ce(1)Se8 hexagonal bipyramids, edges with two equivalent Ce(3)Se8 hexagonal bipyramids, faces with two equivalent Na(1)Se8 hexagonal bipyramids, faces with two equivalent Ce(2)Se8 hexagonal bipyramids, and faces with four equivalent Ce(1)Se8 hexagonal bipyramids. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to one Ce(3), two equivalent Ce(2), and three equivalent Ce(1) atoms to form distorted SeCe6 octahedra that share corners with three equivalent Se(1)Ce6 octahedra, corners with five equivalent Se(2)NaCe5 octahedra, corners with seven equivalent Se(3)NaCe5 octahedra,  an edgeedge with one Se(3)NaCe5 octahedra, edges with two equivalent Se(1)Ce6 octahedra, edges with three equivalent Se(2)NaCe5 octahedra,  a faceface with one Se(2)NaCe5 octahedra, faces with two equivalent Se(1)Ce6 octahedra, and faces with two equivalent Se(3)NaCe5 octahedra. The corner-sharing octahedral tilt angles range from 15-51°. In the second Se site, Se(2) is bonded to one Na(1), one Ce(2), two equivalent Ce(1), and two equivalent Ce(3) atoms to form distorted SeNaCe5 octahedra that share corners with four equivalent Se(3)NaCe5 octahedra, corners with five equivalent Se(1)Ce6 octahedra, corners with six equivalent Se(2)NaCe5 octahedra, edges with three equivalent Se(1)Ce6 octahedra, edges with three equivalent Se(3)NaCe5 octahedra,  a faceface with one Se(1)Ce6 octahedra, faces with two equivalent Se(2)NaCe5 octahedra, and faces with two equivalent Se(3)NaCe5 octahedra. The corner-sharing octahedral tilt angles range from 19-50°. In the third Se site, Se(3) is bonded to one Na(1), one Ce(2), one Ce(3), and three equivalent Ce(1) atoms to form distorted SeNaCe5 octahedra that share corners with four equivalent Se(2)NaCe5 octahedra, corners with four equivalent Se(3)NaCe5 octahedra, corners with seven equivalent Se(1)Ce6 octahedra,  an edgeedge with one Se(1)Ce6 octahedra, edges with two equivalent Se(3)NaCe5 octahedra, edges with three equivalent Se(2)NaCe5 octahedra,  a faceface with one Se(3)NaCe5 octahedra, faces with two equivalent Se(1)Ce6 octahedra, and faces with two equivalent Se(2)NaCe5 octahedra. The corner-sharing octahedral tilt angles range from 15-51°. is represented by the CIF card [CIF]
data_Na(Ce2Se3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.855
_cell_length_b   14.855
_cell_length_c   14.855
_cell_angle_alpha   145.003
_cell_angle_beta   145.003
_cell_angle_gamma   50.330
_symmetry_Int_Tables_number   1
_cell_volume   1072.955
_cell_formula_units_Z   2
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
  Na  Na0  1  0.750  0.250  0.500  1.0
  Na  Na1  1  0.000  0.000  0.000  1.0
  Ce  Ce2  1  0.670  0.792  0.381  1.0
  Ce  Ce3  1  0.083  0.583  0.500  1.0
  Ce  Ce4  1  0.375  0.004  0.129  1.0
  Ce  Ce5  1  0.080  0.962  0.623  1.0
  Ce  Ce6  1  0.667  0.667  0.000  1.0
  Ce  Ce7  1  0.339  0.458  0.377  1.0
  Ce  Ce8  1  0.875  0.246  0.871  1.0
  Ce  Ce9  1  0.038  0.661  0.119  1.0
  Ce  Ce10  1  0.333  0.333  0.000  1.0
  Ce  Ce11  1  0.754  0.625  0.629  1.0
  Ce  Ce12  1  0.996  0.125  0.371  1.0
  Ce  Ce13  1  0.542  0.920  0.881  1.0
  Ce  Ce14  1  0.417  0.917  0.500  1.0
  Ce  Ce15  1  0.712  0.330  0.123  1.0
  Ce  Ce16  1  0.411  0.288  0.619  1.0
  Ce  Ce17  1  0.208  0.589  0.877  1.0
  Se  Se18  1  0.741  0.492  0.099  1.0
  Se  Se19  1  0.178  0.283  0.255  1.0
  Se  Se20  1  0.392  0.642  0.901  1.0
  Se  Se21  1  0.358  0.758  0.750  1.0
  Se  Se22  1  0.009  0.608  0.250  1.0
  Se  Se23  1  0.572  0.327  0.605  1.0
  Se  Se24  1  0.028  0.923  0.745  1.0
  Se  Se25  1  0.407  0.156  0.095  1.0
  Se  Se26  1  0.722  0.967  0.395  1.0
  Se  Se27  1  0.844  0.939  0.250  1.0
  Se  Se28  1  0.061  0.311  0.905  1.0
  Se  Se29  1  0.033  0.428  0.755  1.0
  Se  Se30  1  0.673  0.278  0.245  1.0
  Se  Se31  1  0.242  0.991  0.599  1.0
  Se  Se32  1  0.689  0.593  0.750  1.0
  Se  Se33  1  0.077  0.822  0.105  1.0
  Se  Se34  1  0.392  0.642  0.401  1.0
  Se  Se35  1  0.508  0.608  0.250  1.0
  Se  Se36  1  0.717  0.972  0.895  1.0
  Se  Se37  1  0.689  0.094  0.750  1.0
  Se  Se38  1  0.343  0.939  0.250  1.0
  Se  Se39  1  0.906  0.657  0.595  1.0
  Se  Se40  1  0.358  0.259  0.750  1.0
  Se  Se41  1  0.061  0.311  0.405  1.0
[/CIF]
.
The crystal structure described by Na(Ce2Se3)4 crystallizes in the tetragonal I-42d space group. Na(1) is bonded to four equivalent Se(2) and four equivalent Se(3) atoms to form distorted NaSe8 hexagonal bipyramids that share corners with eight equivalent Ce(1)Se8 hexagonal bipyramids, edges with four equivalent Ce(2)Se8 hexagonal bipyramids, faces with four equivalent Ce(1)Se8 hexagonal bipyramids, and faces with four equivalent Ce(3)Se8 hexagonal bipyramids. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Se(2), three equivalent Se(1), and three equivalent Se(3) atoms to form distorted CeSe8 hexagonal bipyramids that share corners with two equivalent Na(1)Se8 hexagonal bipyramids, corners with two equivalent Ce(1)Se8 hexagonal bipyramids, corners with two equivalent Ce(2)Se8 hexagonal bipyramids, corners with two equivalent Ce(3)Se8 hexagonal bipyramids,  an edgeedge with one Ce(3)Se8 hexagonal bipyramid, edges with three equivalent Ce(1)Se8 hexagonal bipyramids,  a faceface with one Na(1)Se8 hexagonal bipyramid, faces with two equivalent Ce(1)Se8 hexagonal bipyramids, faces with two equivalent Ce(3)Se8 hexagonal bipyramids, and faces with three equivalent Ce(2)Se8 hexagonal bipyramids. In the second Ce site, Ce(2) is bonded to two equivalent Se(2), two equivalent Se(3), and four equivalent Se(1) atoms to form distorted CeSe8 hexagonal bipyramids that share corners with four equivalent Ce(1)Se8 hexagonal bipyramids, corners with four equivalent Ce(3)Se8 hexagonal bipyramids, edges with two equivalent Na(1)Se8 hexagonal bipyramids, edges with two equivalent Ce(2)Se8 hexagonal bipyramids, faces with two equivalent Ce(3)Se8 hexagonal bipyramids, and faces with six equivalent Ce(1)Se8 hexagonal bipyramids. In the third Ce site, Ce(3) is bonded to two equivalent Se(1), two equivalent Se(3), and four equivalent Se(2) atoms to form distorted CeSe8 hexagonal bipyramids that share corners with four equivalent Ce(1)Se8 hexagonal bipyramids, corners with four equivalent Ce(2)Se8 hexagonal bipyramids, edges with two equivalent Ce(1)Se8 hexagonal bipyramids, edges with two equivalent Ce(3)Se8 hexagonal bipyramids, faces with two equivalent Na(1)Se8 hexagonal bipyramids, faces with two equivalent Ce(2)Se8 hexagonal bipyramids, and faces with four equivalent Ce(1)Se8 hexagonal bipyramids. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to one Ce(3), two equivalent Ce(2), and three equivalent Ce(1) atoms to form distorted SeCe6 octahedra that share corners with three equivalent Se(1)Ce6 octahedra, corners with five equivalent Se(2)NaCe5 octahedra, corners with seven equivalent Se(3)NaCe5 octahedra,  an edgeedge with one Se(3)NaCe5 octahedra, edges with two equivalent Se(1)Ce6 octahedra, edges with three equivalent Se(2)NaCe5 octahedra,  a faceface with one Se(2)NaCe5 octahedra, faces with two equivalent Se(1)Ce6 octahedra, and faces with two equivalent Se(3)NaCe5 octahedra. The corner-sharing octahedral tilt angles range from 15-51°. In the second Se site, Se(2) is bonded to one Na(1), one Ce(2), two equivalent Ce(1), and two equivalent Ce(3) atoms to form distorted SeNaCe5 octahedra that share corners with four equivalent Se(3)NaCe5 octahedra, corners with five equivalent Se(1)Ce6 octahedra, corners with six equivalent Se(2)NaCe5 octahedra, edges with three equivalent Se(1)Ce6 octahedra, edges with three equivalent Se(3)NaCe5 octahedra,  a faceface with one Se(1)Ce6 octahedra, faces with two equivalent Se(2)NaCe5 octahedra, and faces with two equivalent Se(3)NaCe5 octahedra. The corner-sharing octahedral tilt angles range from 19-50°. In the third Se site, Se(3) is bonded to one Na(1), one Ce(2), one Ce(3), and three equivalent Ce(1) atoms to form distorted SeNaCe5 octahedra that share corners with four equivalent Se(2)NaCe5 octahedra, corners with four equivalent Se(3)NaCe5 octahedra, corners with seven equivalent Se(1)Ce6 octahedra,  an edgeedge with one Se(1)Ce6 octahedra, edges with two equivalent Se(3)NaCe5 octahedra, edges with three equivalent Se(2)NaCe5 octahedra,  a faceface with one Se(3)NaCe5 octahedra, faces with two equivalent Se(1)Ce6 octahedra, and faces with two equivalent Se(2)NaCe5 octahedra. The corner-sharing octahedral tilt angles range from 15-51°. is represented by the CIF card [CIF]
data_Na(Ce2Se3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.855
_cell_length_b   14.855
_cell_length_c   14.855
_cell_angle_alpha   145.003
_cell_angle_beta   145.003
_cell_angle_gamma   50.330
_symmetry_Int_Tables_number   1
_cell_volume   1072.955
_cell_formula_units_Z   2
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
  Na  Na0  1  0.750  0.250  0.500  1.0
  Na  Na1  1  0.000  0.000  0.000  1.0
  Ce  Ce2  1  0.670  0.792  0.381  1.0
  Ce  Ce3  1  0.083  0.583  0.500  1.0
  Ce  Ce4  1  0.375  0.004  0.129  1.0
  Ce  Ce5  1  0.080  0.962  0.623  1.0
  Ce  Ce6  1  0.667  0.667  0.000  1.0
  Ce  Ce7  1  0.339  0.458  0.377  1.0
  Ce  Ce8  1  0.875  0.246  0.871  1.0
  Ce  Ce9  1  0.038  0.661  0.119  1.0
  Ce  Ce10  1  0.333  0.333  0.000  1.0
  Ce  Ce11  1  0.754  0.625  0.629  1.0
  Ce  Ce12  1  0.996  0.125  0.371  1.0
  Ce  Ce13  1  0.542  0.920  0.881  1.0
  Ce  Ce14  1  0.417  0.917  0.500  1.0
  Ce  Ce15  1  0.712  0.330  0.123  1.0
  Ce  Ce16  1  0.411  0.288  0.619  1.0
  Ce  Ce17  1  0.208  0.589  0.877  1.0
  Se  Se18  1  0.741  0.492  0.099  1.0
  Se  Se19  1  0.178  0.283  0.255  1.0
  Se  Se20  1  0.392  0.642  0.901  1.0
  Se  Se21  1  0.358  0.758  0.750  1.0
  Se  Se22  1  0.009  0.608  0.250  1.0
  Se  Se23  1  0.572  0.327  0.605  1.0
  Se  Se24  1  0.028  0.923  0.745  1.0
  Se  Se25  1  0.407  0.156  0.095  1.0
  Se  Se26  1  0.722  0.967  0.395  1.0
  Se  Se27  1  0.844  0.939  0.250  1.0
  Se  Se28  1  0.061  0.311  0.905  1.0
  Se  Se29  1  0.033  0.428  0.755  1.0
  Se  Se30  1  0.673  0.278  0.245  1.0
  Se  Se31  1  0.242  0.991  0.599  1.0
  Se  Se32  1  0.689  0.593  0.750  1.0
  Se  Se33  1  0.077  0.822  0.105  1.0
  Se  Se34  1  0.392  0.642  0.401  1.0
  Se  Se35  1  0.508  0.608  0.250  1.0
  Se  Se36  1  0.717  0.972  0.895  1.0
  Se  Se37  1  0.689  0.094  0.750  1.0
  Se  Se38  1  0.343  0.939  0.250  1.0
  Se  Se39  1  0.906  0.657  0.595  1.0
  Se  Se40  1  0.358  0.259  0.750  1.0
  Se  Se41  1  0.061  0.311  0.405  1.0
[/CIF]
.