The crystal structure described by Fe2Rh3CuS8 is Spinel-derived structured and crystallizes in the trigonal R3m space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to three equivalent S(2) and three equivalent S(4) atoms to form FeS6 octahedra that share corners with three equivalent Fe(2)S4 tetrahedra, corners with three equivalent Cu(1)S4 tetrahedra, and edges with six equivalent Rh(1)S6 octahedra. In the second Fe site, Fe(2) is bonded to one S(3) and three equivalent S(4) atoms to form FeS4 tetrahedra that share corners with three equivalent Fe(1)S6 octahedra and corners with nine equivalent Rh(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 48-56°. Rh(1) is bonded to one S(1), one S(3), two equivalent S(2), and two equivalent S(4) atoms to form RhS6 octahedra that share corners with three equivalent Fe(2)S4 tetrahedra, corners with three equivalent Cu(1)S4 tetrahedra, edges with two equivalent Fe(1)S6 octahedra, and edges with four equivalent Rh(1)S6 octahedra. Cu(1) is bonded to one S(1) and three equivalent S(2) atoms to form CuS4 tetrahedra that share corners with three equivalent Fe(1)S6 octahedra and corners with nine equivalent Rh(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 57-61°. There are four inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Rh(1) and one Cu(1) atom to form a mixture of distorted corner and edge-sharing SCuRh3 trigonal pyramids. In the second S site, S(2) is bonded to one Fe(1), two equivalent Rh(1), and one Cu(1) atom to form distorted SFeCuRh2 tetrahedra that share corners with two equivalent S(2)FeCuRh2 tetrahedra,  a cornercorner with one S(1)CuRh3 trigonal pyramid, edges with two equivalent S(2)FeCuRh2 tetrahedra, and  an edgeedge with one S(1)CuRh3 trigonal pyramid. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Fe(2) and three equivalent Rh(1) atoms. In the fourth S site, S(4) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), and two equivalent Rh(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe2CuRh3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.808
_cell_length_b   6.808
_cell_length_c   6.808
_cell_angle_alpha   60.297
_cell_angle_beta   60.297
_cell_angle_gamma   60.297
_symmetry_Int_Tables_number   1
_cell_volume   224.587
_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
  Fe  Fe0  1  0.382  0.382  0.382  1.0
  Fe  Fe1  1  0.751  0.751  0.751  1.0
  Cu  Cu2  1  1.000  1.000  1.000  1.0
  Rh  Rh3  1  0.380  0.380  0.863  1.0
  Rh  Rh4  1  0.863  0.380  0.380  1.0
  Rh  Rh5  1  0.380  0.863  0.380  1.0
  S  S6  1  0.134  0.134  0.134  1.0
  S  S7  1  0.141  0.141  0.593  1.0
  S  S8  1  0.593  0.141  0.141  1.0
  S  S9  1  0.141  0.593  0.141  1.0
  S  S10  1  0.625  0.625  0.625  1.0
  S  S11  1  0.616  0.616  0.128  1.0
  S  S12  1  0.128  0.616  0.616  1.0
  S  S13  1  0.616  0.128  0.616  1.0
[/CIF]
.
The crystal structure described by Fe2Rh3CuS8 is Spinel-derived structured and crystallizes in the trigonal R3m space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to three equivalent S(2) and three equivalent S(4) atoms to form FeS6 octahedra that share corners with three equivalent Fe(2)S4 tetrahedra, corners with three equivalent Cu(1)S4 tetrahedra, and edges with six equivalent Rh(1)S6 octahedra. In the second Fe site, Fe(2) is bonded to one S(3) and three equivalent S(4) atoms to form FeS4 tetrahedra that share corners with three equivalent Fe(1)S6 octahedra and corners with nine equivalent Rh(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 48-56°. Rh(1) is bonded to one S(1), one S(3), two equivalent S(2), and two equivalent S(4) atoms to form RhS6 octahedra that share corners with three equivalent Fe(2)S4 tetrahedra, corners with three equivalent Cu(1)S4 tetrahedra, edges with two equivalent Fe(1)S6 octahedra, and edges with four equivalent Rh(1)S6 octahedra. Cu(1) is bonded to one S(1) and three equivalent S(2) atoms to form CuS4 tetrahedra that share corners with three equivalent Fe(1)S6 octahedra and corners with nine equivalent Rh(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 57-61°. There are four inequivalent S sites. In the first S site, S(1) is bonded to three equivalent Rh(1) and one Cu(1) atom to form a mixture of distorted corner and edge-sharing SCuRh3 trigonal pyramids. In the second S site, S(2) is bonded to one Fe(1), two equivalent Rh(1), and one Cu(1) atom to form distorted SFeCuRh2 tetrahedra that share corners with two equivalent S(2)FeCuRh2 tetrahedra,  a cornercorner with one S(1)CuRh3 trigonal pyramid, edges with two equivalent S(2)FeCuRh2 tetrahedra, and  an edgeedge with one S(1)CuRh3 trigonal pyramid. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Fe(2) and three equivalent Rh(1) atoms. In the fourth S site, S(4) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), and two equivalent Rh(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Fe2CuRh3S8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.808
_cell_length_b   6.808
_cell_length_c   6.808
_cell_angle_alpha   60.297
_cell_angle_beta   60.297
_cell_angle_gamma   60.297
_symmetry_Int_Tables_number   1
_cell_volume   224.587
_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
  Fe  Fe0  1  0.382  0.382  0.382  1.0
  Fe  Fe1  1  0.751  0.751  0.751  1.0
  Cu  Cu2  1  1.000  1.000  1.000  1.0
  Rh  Rh3  1  0.380  0.380  0.863  1.0
  Rh  Rh4  1  0.863  0.380  0.380  1.0
  Rh  Rh5  1  0.380  0.863  0.380  1.0
  S  S6  1  0.134  0.134  0.134  1.0
  S  S7  1  0.141  0.141  0.593  1.0
  S  S8  1  0.593  0.141  0.141  1.0
  S  S9  1  0.141  0.593  0.141  1.0
  S  S10  1  0.625  0.625  0.625  1.0
  S  S11  1  0.616  0.616  0.128  1.0
  S  S12  1  0.128  0.616  0.616  1.0
  S  S13  1  0.616  0.128  0.616  1.0
[/CIF]
.