The material structure described by Sm2Te3 crystallizes in the tetragonal I-42d space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to two equivalent Te(1), two equivalent Te(3), and four equivalent Te(2) atoms. In the second Sm site, Sm(2) is bonded to two equivalent Te(2), two equivalent Te(3), and four equivalent Te(1) atoms to form distorted edge-sharing SmTe8 hexagonal bipyramids. In the third Sm site, Sm(3) is bonded in a 8-coordinate geometry to two equivalent Te(1), three equivalent Te(2), and three equivalent Te(3) atoms. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded to one Sm(1), two equivalent Sm(2), and two equivalent Sm(3) atoms to form distorted TeSm5 square pyramids that share corners with five equivalent Te(2)Sm6 octahedra, corners with four equivalent Te(1)Sm5 square pyramids, corners with four equivalent Te(3)Sm5 square pyramids, edges with three equivalent Te(2)Sm6 octahedra,  an edgeedge with one Te(1)Sm5 square pyramid, edges with four equivalent Te(3)Sm5 square pyramids,  a faceface with one Te(2)Sm6 octahedra, and  a faceface with one Te(1)Sm5 square pyramid. The corner-sharing octahedral tilt angles range from 21-49°. In the second Te site, Te(2) is bonded to one Sm(2), two equivalent Sm(1), and three equivalent Sm(3) atoms to form distorted TeSm6 octahedra that share corners with three equivalent Te(2)Sm6 octahedra, corners with five equivalent Te(1)Sm5 square pyramids, corners with seven equivalent Te(3)Sm5 square pyramids, edges with two equivalent Te(2)Sm6 octahedra,  an edgeedge with one Te(3)Sm5 square pyramid, edges with three equivalent Te(1)Sm5 square pyramids, faces with two equivalent Te(2)Sm6 octahedra,  a faceface with one Te(1)Sm5 square pyramid, and faces with two equivalent Te(3)Sm5 square pyramids. The corner-sharing octahedral tilt angles range from 17-50°. In the third Te site, Te(3) is bonded to one Sm(1), one Sm(2), and three equivalent Sm(3) atoms to form distorted TeSm5 square pyramids that share corners with seven equivalent Te(2)Sm6 octahedra, corners with four equivalent Te(1)Sm5 square pyramids, corners with five equivalent Te(3)Sm5 square pyramids,  an edgeedge with one Te(2)Sm6 octahedra, edges with four equivalent Te(1)Sm5 square pyramids, faces with two equivalent Te(2)Sm6 octahedra, and  a faceface with one Te(3)Sm5 square pyramid. The corner-sharing octahedral tilt angles range from 16-53°. is represented by the CIF card [CIF]
data_Sm2Te3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   24.598
_cell_length_b   9.456
_cell_length_c   9.456
_cell_angle_alpha   89.986
_cell_angle_beta   54.786
_cell_angle_gamma   54.784
_symmetry_Int_Tables_number   1
_cell_volume   1273.319
_cell_formula_units_Z   8
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
  Sm  Sm0  1  0.082  0.628  0.378  1.0
  Sm  Sm1  1  0.167  0.250  0.633  1.0
  Sm  Sm2  1  0.337  0.375  0.252  1.0
  Sm  Sm3  1  0.252  0.872  0.122  1.0
  Sm  Sm4  1  0.337  0.115  0.737  1.0
  Sm  Sm5  1  0.167  0.750  0.867  1.0
  Sm  Sm6  1  0.497  0.263  0.625  1.0
  Sm  Sm7  1  0.582  0.878  0.128  1.0
  Sm  Sm8  1  0.667  0.367  0.250  1.0
  Sm  Sm9  1  0.496  0.748  0.885  1.0
  Sm  Sm10  1  0.667  0.133  0.750  1.0
  Sm  Sm11  1  0.752  0.622  0.372  1.0
  Sm  Sm12  1  0.837  0.237  0.615  1.0
  Sm  Sm13  1  0.996  0.385  0.248  1.0
  Sm  Sm14  1  0.837  0.752  0.875  1.0
  Sm  Sm15  1  0.997  0.125  0.763  1.0
  Te  Te16  1  0.125  0.491  0.994  1.0
  Te  Te17  1  0.049  0.353  0.496  1.0
  Te  Te18  1  0.284  0.147  0.143  1.0
  Te  Te19  1  0.049  0.999  0.357  1.0
  Te  Te20  1  0.284  0.501  0.005  1.0
  Te  Te21  1  0.209  0.009  0.868  1.0
  Te  Te22  1  0.125  0.634  0.632  1.0
  Te  Te23  1  0.209  0.865  0.506  1.0
  Te  Te24  1  0.450  0.496  0.003  1.0
  Te  Te25  1  0.384  0.353  0.504  1.0
  Te  Te26  1  0.383  0.997  0.346  1.0
  Te  Te27  1  0.625  0.132  0.134  1.0
  Te  Te28  1  0.625  0.494  0.991  1.0
  Te  Te29  1  0.549  0.995  0.853  1.0
  Te  Te30  1  0.450  0.654  0.647  1.0
  Te  Te31  1  0.549  0.857  0.499  1.0
  Te  Te32  1  0.784  0.505  0.001  1.0
  Te  Te33  1  0.709  0.368  0.509  1.0
  Te  Te34  1  0.709  0.006  0.365  1.0
  Te  Te35  1  0.950  0.147  0.154  1.0
  Te  Te36  1  0.950  0.503  0.996  1.0
  Te  Te37  1  0.784  0.643  0.647  1.0
  Te  Te38  1  0.884  0.004  0.853  1.0
  Te  Te39  1  0.883  0.846  0.497  1.0
[/CIF]
.
The material structure described by Sm2Te3 crystallizes in the tetragonal I-42d space group. There are three inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to two equivalent Te(1), two equivalent Te(3), and four equivalent Te(2) atoms. In the second Sm site, Sm(2) is bonded to two equivalent Te(2), two equivalent Te(3), and four equivalent Te(1) atoms to form distorted edge-sharing SmTe8 hexagonal bipyramids. In the third Sm site, Sm(3) is bonded in a 8-coordinate geometry to two equivalent Te(1), three equivalent Te(2), and three equivalent Te(3) atoms. There are three inequivalent Te sites. In the first Te site, Te(1) is bonded to one Sm(1), two equivalent Sm(2), and two equivalent Sm(3) atoms to form distorted TeSm5 square pyramids that share corners with five equivalent Te(2)Sm6 octahedra, corners with four equivalent Te(1)Sm5 square pyramids, corners with four equivalent Te(3)Sm5 square pyramids, edges with three equivalent Te(2)Sm6 octahedra,  an edgeedge with one Te(1)Sm5 square pyramid, edges with four equivalent Te(3)Sm5 square pyramids,  a faceface with one Te(2)Sm6 octahedra, and  a faceface with one Te(1)Sm5 square pyramid. The corner-sharing octahedral tilt angles range from 21-49°. In the second Te site, Te(2) is bonded to one Sm(2), two equivalent Sm(1), and three equivalent Sm(3) atoms to form distorted TeSm6 octahedra that share corners with three equivalent Te(2)Sm6 octahedra, corners with five equivalent Te(1)Sm5 square pyramids, corners with seven equivalent Te(3)Sm5 square pyramids, edges with two equivalent Te(2)Sm6 octahedra,  an edgeedge with one Te(3)Sm5 square pyramid, edges with three equivalent Te(1)Sm5 square pyramids, faces with two equivalent Te(2)Sm6 octahedra,  a faceface with one Te(1)Sm5 square pyramid, and faces with two equivalent Te(3)Sm5 square pyramids. The corner-sharing octahedral tilt angles range from 17-50°. In the third Te site, Te(3) is bonded to one Sm(1), one Sm(2), and three equivalent Sm(3) atoms to form distorted TeSm5 square pyramids that share corners with seven equivalent Te(2)Sm6 octahedra, corners with four equivalent Te(1)Sm5 square pyramids, corners with five equivalent Te(3)Sm5 square pyramids,  an edgeedge with one Te(2)Sm6 octahedra, edges with four equivalent Te(1)Sm5 square pyramids, faces with two equivalent Te(2)Sm6 octahedra, and  a faceface with one Te(3)Sm5 square pyramid. The corner-sharing octahedral tilt angles range from 16-53°. is represented by the CIF card [CIF]
data_Sm2Te3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   24.598
_cell_length_b   9.456
_cell_length_c   9.456
_cell_angle_alpha   89.986
_cell_angle_beta   54.786
_cell_angle_gamma   54.784
_symmetry_Int_Tables_number   1
_cell_volume   1273.319
_cell_formula_units_Z   8
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
  Sm  Sm0  1  0.082  0.628  0.378  1.0
  Sm  Sm1  1  0.167  0.250  0.633  1.0
  Sm  Sm2  1  0.337  0.375  0.252  1.0
  Sm  Sm3  1  0.252  0.872  0.122  1.0
  Sm  Sm4  1  0.337  0.115  0.737  1.0
  Sm  Sm5  1  0.167  0.750  0.867  1.0
  Sm  Sm6  1  0.497  0.263  0.625  1.0
  Sm  Sm7  1  0.582  0.878  0.128  1.0
  Sm  Sm8  1  0.667  0.367  0.250  1.0
  Sm  Sm9  1  0.496  0.748  0.885  1.0
  Sm  Sm10  1  0.667  0.133  0.750  1.0
  Sm  Sm11  1  0.752  0.622  0.372  1.0
  Sm  Sm12  1  0.837  0.237  0.615  1.0
  Sm  Sm13  1  0.996  0.385  0.248  1.0
  Sm  Sm14  1  0.837  0.752  0.875  1.0
  Sm  Sm15  1  0.997  0.125  0.763  1.0
  Te  Te16  1  0.125  0.491  0.994  1.0
  Te  Te17  1  0.049  0.353  0.496  1.0
  Te  Te18  1  0.284  0.147  0.143  1.0
  Te  Te19  1  0.049  0.999  0.357  1.0
  Te  Te20  1  0.284  0.501  0.005  1.0
  Te  Te21  1  0.209  0.009  0.868  1.0
  Te  Te22  1  0.125  0.634  0.632  1.0
  Te  Te23  1  0.209  0.865  0.506  1.0
  Te  Te24  1  0.450  0.496  0.003  1.0
  Te  Te25  1  0.384  0.353  0.504  1.0
  Te  Te26  1  0.383  0.997  0.346  1.0
  Te  Te27  1  0.625  0.132  0.134  1.0
  Te  Te28  1  0.625  0.494  0.991  1.0
  Te  Te29  1  0.549  0.995  0.853  1.0
  Te  Te30  1  0.450  0.654  0.647  1.0
  Te  Te31  1  0.549  0.857  0.499  1.0
  Te  Te32  1  0.784  0.505  0.001  1.0
  Te  Te33  1  0.709  0.368  0.509  1.0
  Te  Te34  1  0.709  0.006  0.365  1.0
  Te  Te35  1  0.950  0.147  0.154  1.0
  Te  Te36  1  0.950  0.503  0.996  1.0
  Te  Te37  1  0.784  0.643  0.647  1.0
  Te  Te38  1  0.884  0.004  0.853  1.0
  Te  Te39  1  0.883  0.846  0.497  1.0
[/CIF]
.