The material structure described by Na(La2Se3)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 La(1)Se8 hexagonal bipyramids, edges with four equivalent La(2)Se8 hexagonal bipyramids, faces with four equivalent La(1)Se8 hexagonal bipyramids, and faces with four equivalent La(3)Se8 hexagonal bipyramids. There are three inequivalent La sites. In the first La site, La(1) is bonded to two equivalent Se(2), three equivalent Se(1), and three equivalent Se(3) atoms to form distorted LaSe8 hexagonal bipyramids that share corners with two equivalent Na(1)Se8 hexagonal bipyramids, corners with two equivalent La(1)Se8 hexagonal bipyramids, corners with two equivalent La(2)Se8 hexagonal bipyramids, corners with two equivalent La(3)Se8 hexagonal bipyramids,  an edgeedge with one La(3)Se8 hexagonal bipyramid, edges with three equivalent La(1)Se8 hexagonal bipyramids,  a faceface with one Na(1)Se8 hexagonal bipyramid, faces with two equivalent La(1)Se8 hexagonal bipyramids, faces with two equivalent La(3)Se8 hexagonal bipyramids, and faces with three equivalent La(2)Se8 hexagonal bipyramids. In the second La site, La(2) is bonded to two equivalent Se(2), two equivalent Se(3), and four equivalent Se(1) atoms to form distorted LaSe8 hexagonal bipyramids that share corners with four equivalent La(1)Se8 hexagonal bipyramids, corners with four equivalent La(3)Se8 hexagonal bipyramids, edges with two equivalent Na(1)Se8 hexagonal bipyramids, edges with two equivalent La(2)Se8 hexagonal bipyramids, faces with two equivalent La(3)Se8 hexagonal bipyramids, and faces with six equivalent La(1)Se8 hexagonal bipyramids. In the third La site, La(3) is bonded to two equivalent Se(1), two equivalent Se(3), and four equivalent Se(2) atoms to form distorted LaSe8 hexagonal bipyramids that share corners with four equivalent La(1)Se8 hexagonal bipyramids, corners with four equivalent La(2)Se8 hexagonal bipyramids, edges with two equivalent La(1)Se8 hexagonal bipyramids, edges with two equivalent La(3)Se8 hexagonal bipyramids, faces with two equivalent Na(1)Se8 hexagonal bipyramids, faces with two equivalent La(2)Se8 hexagonal bipyramids, and faces with four equivalent La(1)Se8 hexagonal bipyramids. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to one La(3), two equivalent La(2), and three equivalent La(1) atoms to form distorted SeLa6 octahedra that share corners with three equivalent Se(1)La6 octahedra, corners with five equivalent Se(2)NaLa5 octahedra, corners with seven equivalent Se(3)NaLa5 octahedra,  an edgeedge with one Se(3)NaLa5 octahedra, edges with two equivalent Se(1)La6 octahedra, edges with three equivalent Se(2)NaLa5 octahedra,  a faceface with one Se(2)NaLa5 octahedra, faces with two equivalent Se(1)La6 octahedra, and faces with two equivalent Se(3)NaLa5 octahedra. The corner-sharing octahedral tilt angles range from 15-52°. In the second Se site, Se(2) is bonded to one Na(1), one La(2), two equivalent La(1), and two equivalent La(3) atoms to form distorted SeNaLa5 octahedra that share corners with four equivalent Se(3)NaLa5 octahedra, corners with five equivalent Se(1)La6 octahedra, corners with six equivalent Se(2)NaLa5 octahedra, edges with three equivalent Se(1)La6 octahedra, edges with three equivalent Se(3)NaLa5 octahedra,  a faceface with one Se(1)La6 octahedra, faces with two equivalent Se(2)NaLa5 octahedra, and faces with two equivalent Se(3)NaLa5 octahedra. The corner-sharing octahedral tilt angles range from 20-50°. In the third Se site, Se(3) is bonded to one Na(1), one La(2), one La(3), and three equivalent La(1) atoms to form distorted SeNaLa5 octahedra that share corners with four equivalent Se(2)NaLa5 octahedra, corners with four equivalent Se(3)NaLa5 octahedra, corners with seven equivalent Se(1)La6 octahedra,  an edgeedge with one Se(1)La6 octahedra, edges with two equivalent Se(3)NaLa5 octahedra, edges with three equivalent Se(2)NaLa5 octahedra,  a faceface with one Se(3)NaLa5 octahedra, faces with two equivalent Se(1)La6 octahedra, and faces with two equivalent Se(2)NaLa5 octahedra. The corner-sharing octahedral tilt angles range from 15-52°. is represented by the CIF file [CIF]
data_Na(La2Se3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.108
_cell_length_b   15.108
_cell_length_c   15.108
_cell_angle_alpha   144.957
_cell_angle_beta   144.957
_cell_angle_gamma   50.398
_symmetry_Int_Tables_number   1
_cell_volume   1131.257
_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  0.000  0.000  0.000  1.0
  Na  Na1  1  0.750  0.250  0.500  1.0
  La  La2  1  0.341  0.456  0.378  1.0
  La  La3  1  0.079  0.963  0.622  1.0
  La  La4  1  0.667  0.667  0.000  1.0
  La  La5  1  0.375  0.005  0.130  1.0
  La  La6  1  0.671  0.794  0.385  1.0
  La  La7  1  0.083  0.583  0.500  1.0
  La  La8  1  0.409  0.287  0.615  1.0
  La  La9  1  0.875  0.245  0.870  1.0
  La  La10  1  0.713  0.329  0.122  1.0
  La  La11  1  0.995  0.125  0.370  1.0
  La  La12  1  0.417  0.917  0.500  1.0
  La  La13  1  0.755  0.625  0.630  1.0
  La  La14  1  0.206  0.591  0.878  1.0
  La  La15  1  0.333  0.333  0.000  1.0
  La  La16  1  0.037  0.659  0.115  1.0
  La  La17  1  0.544  0.921  0.885  1.0
  Se  Se18  1  0.009  0.609  0.251  1.0
  Se  Se19  1  0.573  0.326  0.606  1.0
  Se  Se20  1  0.358  0.757  0.749  1.0
  Se  Se21  1  0.392  0.641  0.900  1.0
  Se  Se22  1  0.741  0.493  0.100  1.0
  Se  Se23  1  0.721  0.968  0.394  1.0
  Se  Se24  1  0.342  0.939  0.249  1.0
  Se  Se25  1  0.029  0.924  0.747  1.0
  Se  Se26  1  0.907  0.658  0.597  1.0
  Se  Se27  1  0.690  0.093  0.751  1.0
  Se  Se28  1  0.177  0.282  0.253  1.0
  Se  Se29  1  0.718  0.971  0.894  1.0
  Se  Se30  1  0.076  0.823  0.106  1.0
  Se  Se31  1  0.061  0.310  0.403  1.0
  Se  Se32  1  0.674  0.279  0.247  1.0
  Se  Se33  1  0.359  0.259  0.751  1.0
  Se  Se34  1  0.243  0.991  0.600  1.0
  Se  Se35  1  0.032  0.427  0.753  1.0
  Se  Se36  1  0.507  0.608  0.249  1.0
  Se  Se37  1  0.060  0.311  0.903  1.0
  Se  Se38  1  0.408  0.157  0.097  1.0
  Se  Se39  1  0.391  0.642  0.400  1.0
  Se  Se40  1  0.689  0.592  0.749  1.0
  Se  Se41  1  0.843  0.940  0.251  1.0
[/CIF]
.
The material structure described by Na(La2Se3)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 La(1)Se8 hexagonal bipyramids, edges with four equivalent La(2)Se8 hexagonal bipyramids, faces with four equivalent La(1)Se8 hexagonal bipyramids, and faces with four equivalent La(3)Se8 hexagonal bipyramids. There are three inequivalent La sites. In the first La site, La(1) is bonded to two equivalent Se(2), three equivalent Se(1), and three equivalent Se(3) atoms to form distorted LaSe8 hexagonal bipyramids that share corners with two equivalent Na(1)Se8 hexagonal bipyramids, corners with two equivalent La(1)Se8 hexagonal bipyramids, corners with two equivalent La(2)Se8 hexagonal bipyramids, corners with two equivalent La(3)Se8 hexagonal bipyramids,  an edgeedge with one La(3)Se8 hexagonal bipyramid, edges with three equivalent La(1)Se8 hexagonal bipyramids,  a faceface with one Na(1)Se8 hexagonal bipyramid, faces with two equivalent La(1)Se8 hexagonal bipyramids, faces with two equivalent La(3)Se8 hexagonal bipyramids, and faces with three equivalent La(2)Se8 hexagonal bipyramids. In the second La site, La(2) is bonded to two equivalent Se(2), two equivalent Se(3), and four equivalent Se(1) atoms to form distorted LaSe8 hexagonal bipyramids that share corners with four equivalent La(1)Se8 hexagonal bipyramids, corners with four equivalent La(3)Se8 hexagonal bipyramids, edges with two equivalent Na(1)Se8 hexagonal bipyramids, edges with two equivalent La(2)Se8 hexagonal bipyramids, faces with two equivalent La(3)Se8 hexagonal bipyramids, and faces with six equivalent La(1)Se8 hexagonal bipyramids. In the third La site, La(3) is bonded to two equivalent Se(1), two equivalent Se(3), and four equivalent Se(2) atoms to form distorted LaSe8 hexagonal bipyramids that share corners with four equivalent La(1)Se8 hexagonal bipyramids, corners with four equivalent La(2)Se8 hexagonal bipyramids, edges with two equivalent La(1)Se8 hexagonal bipyramids, edges with two equivalent La(3)Se8 hexagonal bipyramids, faces with two equivalent Na(1)Se8 hexagonal bipyramids, faces with two equivalent La(2)Se8 hexagonal bipyramids, and faces with four equivalent La(1)Se8 hexagonal bipyramids. There are three inequivalent Se sites. In the first Se site, Se(1) is bonded to one La(3), two equivalent La(2), and three equivalent La(1) atoms to form distorted SeLa6 octahedra that share corners with three equivalent Se(1)La6 octahedra, corners with five equivalent Se(2)NaLa5 octahedra, corners with seven equivalent Se(3)NaLa5 octahedra,  an edgeedge with one Se(3)NaLa5 octahedra, edges with two equivalent Se(1)La6 octahedra, edges with three equivalent Se(2)NaLa5 octahedra,  a faceface with one Se(2)NaLa5 octahedra, faces with two equivalent Se(1)La6 octahedra, and faces with two equivalent Se(3)NaLa5 octahedra. The corner-sharing octahedral tilt angles range from 15-52°. In the second Se site, Se(2) is bonded to one Na(1), one La(2), two equivalent La(1), and two equivalent La(3) atoms to form distorted SeNaLa5 octahedra that share corners with four equivalent Se(3)NaLa5 octahedra, corners with five equivalent Se(1)La6 octahedra, corners with six equivalent Se(2)NaLa5 octahedra, edges with three equivalent Se(1)La6 octahedra, edges with three equivalent Se(3)NaLa5 octahedra,  a faceface with one Se(1)La6 octahedra, faces with two equivalent Se(2)NaLa5 octahedra, and faces with two equivalent Se(3)NaLa5 octahedra. The corner-sharing octahedral tilt angles range from 20-50°. In the third Se site, Se(3) is bonded to one Na(1), one La(2), one La(3), and three equivalent La(1) atoms to form distorted SeNaLa5 octahedra that share corners with four equivalent Se(2)NaLa5 octahedra, corners with four equivalent Se(3)NaLa5 octahedra, corners with seven equivalent Se(1)La6 octahedra,  an edgeedge with one Se(1)La6 octahedra, edges with two equivalent Se(3)NaLa5 octahedra, edges with three equivalent Se(2)NaLa5 octahedra,  a faceface with one Se(3)NaLa5 octahedra, faces with two equivalent Se(1)La6 octahedra, and faces with two equivalent Se(2)NaLa5 octahedra. The corner-sharing octahedral tilt angles range from 15-52°. is represented by the CIF file [CIF]
data_Na(La2Se3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.108
_cell_length_b   15.108
_cell_length_c   15.108
_cell_angle_alpha   144.957
_cell_angle_beta   144.957
_cell_angle_gamma   50.398
_symmetry_Int_Tables_number   1
_cell_volume   1131.257
_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  0.000  0.000  0.000  1.0
  Na  Na1  1  0.750  0.250  0.500  1.0
  La  La2  1  0.341  0.456  0.378  1.0
  La  La3  1  0.079  0.963  0.622  1.0
  La  La4  1  0.667  0.667  0.000  1.0
  La  La5  1  0.375  0.005  0.130  1.0
  La  La6  1  0.671  0.794  0.385  1.0
  La  La7  1  0.083  0.583  0.500  1.0
  La  La8  1  0.409  0.287  0.615  1.0
  La  La9  1  0.875  0.245  0.870  1.0
  La  La10  1  0.713  0.329  0.122  1.0
  La  La11  1  0.995  0.125  0.370  1.0
  La  La12  1  0.417  0.917  0.500  1.0
  La  La13  1  0.755  0.625  0.630  1.0
  La  La14  1  0.206  0.591  0.878  1.0
  La  La15  1  0.333  0.333  0.000  1.0
  La  La16  1  0.037  0.659  0.115  1.0
  La  La17  1  0.544  0.921  0.885  1.0
  Se  Se18  1  0.009  0.609  0.251  1.0
  Se  Se19  1  0.573  0.326  0.606  1.0
  Se  Se20  1  0.358  0.757  0.749  1.0
  Se  Se21  1  0.392  0.641  0.900  1.0
  Se  Se22  1  0.741  0.493  0.100  1.0
  Se  Se23  1  0.721  0.968  0.394  1.0
  Se  Se24  1  0.342  0.939  0.249  1.0
  Se  Se25  1  0.029  0.924  0.747  1.0
  Se  Se26  1  0.907  0.658  0.597  1.0
  Se  Se27  1  0.690  0.093  0.751  1.0
  Se  Se28  1  0.177  0.282  0.253  1.0
  Se  Se29  1  0.718  0.971  0.894  1.0
  Se  Se30  1  0.076  0.823  0.106  1.0
  Se  Se31  1  0.061  0.310  0.403  1.0
  Se  Se32  1  0.674  0.279  0.247  1.0
  Se  Se33  1  0.359  0.259  0.751  1.0
  Se  Se34  1  0.243  0.991  0.600  1.0
  Se  Se35  1  0.032  0.427  0.753  1.0
  Se  Se36  1  0.507  0.608  0.249  1.0
  Se  Se37  1  0.060  0.311  0.903  1.0
  Se  Se38  1  0.408  0.157  0.097  1.0
  Se  Se39  1  0.391  0.642  0.400  1.0
  Se  Se40  1  0.689  0.592  0.749  1.0
  Se  Se41  1  0.843  0.940  0.251  1.0
[/CIF]
.