The structure described by Eu3Sm3S8 crystallizes in the monoclinic C2 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted EuS8 hexagonal bipyramids that share corners with four equivalent Eu(2)S8 hexagonal bipyramids, corners with four equivalent Sm(1)S8 hexagonal bipyramids, edges with four equivalent Sm(2)S8 hexagonal bipyramids, faces with four equivalent Eu(2)S8 hexagonal bipyramids, and faces with four equivalent Sm(1)S8 hexagonal bipyramids. In the second Eu site, Eu(2) is bonded to two equivalent S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted EuS8 hexagonal bipyramids that share corners with two equivalent Eu(1)S8 hexagonal bipyramids, corners with two equivalent Sm(2)S8 hexagonal bipyramids, corners with four equivalent Sm(1)S8 hexagonal bipyramids, edges with four equivalent Eu(2)S8 hexagonal bipyramids, faces with two equivalent Eu(1)S8 hexagonal bipyramids, faces with two equivalent Sm(2)S8 hexagonal bipyramids, and faces with four equivalent Sm(1)S8 hexagonal bipyramids. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to two equivalent S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted SmS8 hexagonal bipyramids that share corners with two equivalent Eu(1)S8 hexagonal bipyramids, corners with two equivalent Sm(2)S8 hexagonal bipyramids, corners with four equivalent Eu(2)S8 hexagonal bipyramids, edges with four equivalent Sm(1)S8 hexagonal bipyramids, faces with two equivalent Eu(1)S8 hexagonal bipyramids, faces with two equivalent Sm(2)S8 hexagonal bipyramids, and faces with four equivalent Eu(2)S8 hexagonal bipyramids. In the second Sm site, Sm(2) is bonded to two equivalent S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted SmS8 hexagonal bipyramids that share corners with four equivalent Eu(2)S8 hexagonal bipyramids, corners with four equivalent Sm(1)S8 hexagonal bipyramids, edges with four equivalent Eu(1)S8 hexagonal bipyramids, faces with four equivalent Eu(2)S8 hexagonal bipyramids, and faces with four equivalent Sm(1)S8 hexagonal bipyramids. There are four inequivalent S sites. In the first S site, S(1) is bonded to one Eu(1), two equivalent Eu(2), one Sm(2), and two equivalent Sm(1) atoms to form a mixture of distorted edge, corner, and face-sharing SSm3Eu3 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. In the second S site, S(2) is bonded to one Eu(1), two equivalent Eu(2), one Sm(2), and two equivalent Sm(1) atoms to form a mixture of distorted edge, corner, and face-sharing SSm3Eu3 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. In the third S site, S(3) is bonded to one Eu(1), two equivalent Eu(2), one Sm(2), and two equivalent Sm(1) atoms to form a mixture of distorted edge, corner, and face-sharing SSm3Eu3 octahedra. The corner-sharing octahedral tilt angles range from 18-50°. In the fourth S site, S(4) is bonded to one Eu(1), two equivalent Eu(2), one Sm(2), and two equivalent Sm(1) atoms to form a mixture of distorted edge, corner, and face-sharing SSm3Eu3 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. is represented by the CIF file [CIF]
data_Sm3Eu3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.418
_cell_length_b   7.418
_cell_length_c   8.562
_cell_angle_alpha   54.911
_cell_angle_beta   54.911
_cell_angle_gamma   70.587
_symmetry_Int_Tables_number   1
_cell_volume   315.477
_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
  Sm  Sm0  1  0.627  0.125  0.876  1.0
  Sm  Sm1  1  0.372  0.628  0.000  1.0
  Sm  Sm2  1  0.875  0.373  0.124  1.0
  Eu  Eu3  1  0.127  0.873  0.500  1.0
  Eu  Eu4  1  0.750  0.752  0.376  1.0
  Eu  Eu5  1  0.248  0.250  0.624  1.0
  S  S6  1  0.504  0.152  0.242  1.0
  S  S7  1  0.998  0.851  0.898  1.0
  S  S8  1  0.149  0.002  0.102  1.0
  S  S9  1  0.999  0.358  0.389  1.0
  S  S10  1  0.505  0.644  0.241  1.0
  S  S11  1  0.848  0.496  0.758  1.0
  S  S12  1  0.642  0.001  0.611  1.0
  S  S13  1  0.356  0.495  0.759  1.0
[/CIF]
.
The structure described by Eu3Sm3S8 crystallizes in the monoclinic C2 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to two equivalent S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted EuS8 hexagonal bipyramids that share corners with four equivalent Eu(2)S8 hexagonal bipyramids, corners with four equivalent Sm(1)S8 hexagonal bipyramids, edges with four equivalent Sm(2)S8 hexagonal bipyramids, faces with four equivalent Eu(2)S8 hexagonal bipyramids, and faces with four equivalent Sm(1)S8 hexagonal bipyramids. In the second Eu site, Eu(2) is bonded to two equivalent S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted EuS8 hexagonal bipyramids that share corners with two equivalent Eu(1)S8 hexagonal bipyramids, corners with two equivalent Sm(2)S8 hexagonal bipyramids, corners with four equivalent Sm(1)S8 hexagonal bipyramids, edges with four equivalent Eu(2)S8 hexagonal bipyramids, faces with two equivalent Eu(1)S8 hexagonal bipyramids, faces with two equivalent Sm(2)S8 hexagonal bipyramids, and faces with four equivalent Sm(1)S8 hexagonal bipyramids. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to two equivalent S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted SmS8 hexagonal bipyramids that share corners with two equivalent Eu(1)S8 hexagonal bipyramids, corners with two equivalent Sm(2)S8 hexagonal bipyramids, corners with four equivalent Eu(2)S8 hexagonal bipyramids, edges with four equivalent Sm(1)S8 hexagonal bipyramids, faces with two equivalent Eu(1)S8 hexagonal bipyramids, faces with two equivalent Sm(2)S8 hexagonal bipyramids, and faces with four equivalent Eu(2)S8 hexagonal bipyramids. In the second Sm site, Sm(2) is bonded to two equivalent S(1), two equivalent S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted SmS8 hexagonal bipyramids that share corners with four equivalent Eu(2)S8 hexagonal bipyramids, corners with four equivalent Sm(1)S8 hexagonal bipyramids, edges with four equivalent Eu(1)S8 hexagonal bipyramids, faces with four equivalent Eu(2)S8 hexagonal bipyramids, and faces with four equivalent Sm(1)S8 hexagonal bipyramids. There are four inequivalent S sites. In the first S site, S(1) is bonded to one Eu(1), two equivalent Eu(2), one Sm(2), and two equivalent Sm(1) atoms to form a mixture of distorted edge, corner, and face-sharing SSm3Eu3 octahedra. The corner-sharing octahedral tilt angles range from 16-50°. In the second S site, S(2) is bonded to one Eu(1), two equivalent Eu(2), one Sm(2), and two equivalent Sm(1) atoms to form a mixture of distorted edge, corner, and face-sharing SSm3Eu3 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. In the third S site, S(3) is bonded to one Eu(1), two equivalent Eu(2), one Sm(2), and two equivalent Sm(1) atoms to form a mixture of distorted edge, corner, and face-sharing SSm3Eu3 octahedra. The corner-sharing octahedral tilt angles range from 18-50°. In the fourth S site, S(4) is bonded to one Eu(1), two equivalent Eu(2), one Sm(2), and two equivalent Sm(1) atoms to form a mixture of distorted edge, corner, and face-sharing SSm3Eu3 octahedra. The corner-sharing octahedral tilt angles range from 17-50°. is represented by the CIF file [CIF]
data_Sm3Eu3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.418
_cell_length_b   7.418
_cell_length_c   8.562
_cell_angle_alpha   54.911
_cell_angle_beta   54.911
_cell_angle_gamma   70.587
_symmetry_Int_Tables_number   1
_cell_volume   315.477
_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
  Sm  Sm0  1  0.627  0.125  0.876  1.0
  Sm  Sm1  1  0.372  0.628  0.000  1.0
  Sm  Sm2  1  0.875  0.373  0.124  1.0
  Eu  Eu3  1  0.127  0.873  0.500  1.0
  Eu  Eu4  1  0.750  0.752  0.376  1.0
  Eu  Eu5  1  0.248  0.250  0.624  1.0
  S  S6  1  0.504  0.152  0.242  1.0
  S  S7  1  0.998  0.851  0.898  1.0
  S  S8  1  0.149  0.002  0.102  1.0
  S  S9  1  0.999  0.358  0.389  1.0
  S  S10  1  0.505  0.644  0.241  1.0
  S  S11  1  0.848  0.496  0.758  1.0
  S  S12  1  0.642  0.001  0.611  1.0
  S  S13  1  0.356  0.495  0.759  1.0
[/CIF]
.