The structure described by Rh3Sn is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to four equivalent Rh(1), four equivalent Rh(2), and four equivalent Sn(1) atoms to form distorted RhSn4Rh8 cuboctahedra that share corners with twelve equivalent Rh(1)Sn4Rh8 cuboctahedra, edges with eight equivalent Rh(1)Sn4Rh8 cuboctahedra, edges with eight equivalent Rh(2)Sn4Rh8 cuboctahedra, edges with eight equivalent Sn(1)Rh12 cuboctahedra, faces with four equivalent Rh(2)Sn4Rh8 cuboctahedra, faces with four equivalent Sn(1)Rh12 cuboctahedra, and faces with ten equivalent Rh(1)Sn4Rh8 cuboctahedra. In the second Rh site, Rh(2) is bonded to eight equivalent Rh(1) and four equivalent Sn(1) atoms to form RhSn4Rh8 cuboctahedra that share corners with four equivalent Rh(2)Sn4Rh8 cuboctahedra, corners with eight equivalent Sn(1)Rh12 cuboctahedra, edges with eight equivalent Rh(2)Sn4Rh8 cuboctahedra, edges with sixteen equivalent Rh(1)Sn4Rh8 cuboctahedra, faces with four equivalent Rh(2)Sn4Rh8 cuboctahedra, faces with six equivalent Sn(1)Rh12 cuboctahedra, and faces with eight equivalent Rh(1)Sn4Rh8 cuboctahedra. Sn(1) is bonded to four equivalent Rh(2) and eight equivalent Rh(1) atoms to form SnRh12 cuboctahedra that share corners with four equivalent Sn(1)Rh12 cuboctahedra, corners with eight equivalent Rh(2)Sn4Rh8 cuboctahedra, edges with eight equivalent Sn(1)Rh12 cuboctahedra, edges with sixteen equivalent Rh(1)Sn4Rh8 cuboctahedra, faces with four equivalent Sn(1)Rh12 cuboctahedra, faces with six equivalent Rh(2)Sn4Rh8 cuboctahedra, and faces with eight equivalent Rh(1)Sn4Rh8 cuboctahedra. is represented by the CIF card [CIF]
data_SnRh3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.736
_cell_length_b   4.736
_cell_length_c   4.736
_cell_angle_alpha   130.053
_cell_angle_beta   130.053
_cell_angle_gamma   73.322
_symmetry_Int_Tables_number   1
_cell_volume   60.746
_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
  Sn  Sn0  1  0.000  0.000  0.000  1.0
  Rh  Rh1  1  0.750  0.250  0.500  1.0
  Rh  Rh2  1  0.250  0.750  0.500  1.0
  Rh  Rh3  1  0.500  0.500  0.000  1.0
[/CIF]
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The structure described by Rh3Sn is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to four equivalent Rh(1), four equivalent Rh(2), and four equivalent Sn(1) atoms to form distorted RhSn4Rh8 cuboctahedra that share corners with twelve equivalent Rh(1)Sn4Rh8 cuboctahedra, edges with eight equivalent Rh(1)Sn4Rh8 cuboctahedra, edges with eight equivalent Rh(2)Sn4Rh8 cuboctahedra, edges with eight equivalent Sn(1)Rh12 cuboctahedra, faces with four equivalent Rh(2)Sn4Rh8 cuboctahedra, faces with four equivalent Sn(1)Rh12 cuboctahedra, and faces with ten equivalent Rh(1)Sn4Rh8 cuboctahedra. In the second Rh site, Rh(2) is bonded to eight equivalent Rh(1) and four equivalent Sn(1) atoms to form RhSn4Rh8 cuboctahedra that share corners with four equivalent Rh(2)Sn4Rh8 cuboctahedra, corners with eight equivalent Sn(1)Rh12 cuboctahedra, edges with eight equivalent Rh(2)Sn4Rh8 cuboctahedra, edges with sixteen equivalent Rh(1)Sn4Rh8 cuboctahedra, faces with four equivalent Rh(2)Sn4Rh8 cuboctahedra, faces with six equivalent Sn(1)Rh12 cuboctahedra, and faces with eight equivalent Rh(1)Sn4Rh8 cuboctahedra. Sn(1) is bonded to four equivalent Rh(2) and eight equivalent Rh(1) atoms to form SnRh12 cuboctahedra that share corners with four equivalent Sn(1)Rh12 cuboctahedra, corners with eight equivalent Rh(2)Sn4Rh8 cuboctahedra, edges with eight equivalent Sn(1)Rh12 cuboctahedra, edges with sixteen equivalent Rh(1)Sn4Rh8 cuboctahedra, faces with four equivalent Sn(1)Rh12 cuboctahedra, faces with six equivalent Rh(2)Sn4Rh8 cuboctahedra, and faces with eight equivalent Rh(1)Sn4Rh8 cuboctahedra. is represented by the CIF card [CIF]
data_SnRh3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.736
_cell_length_b   4.736
_cell_length_c   4.736
_cell_angle_alpha   130.053
_cell_angle_beta   130.053
_cell_angle_gamma   73.322
_symmetry_Int_Tables_number   1
_cell_volume   60.746
_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
  Sn  Sn0  1  0.000  0.000  0.000  1.0
  Rh  Rh1  1  0.750  0.250  0.500  1.0
  Rh  Rh2  1  0.250  0.750  0.500  1.0
  Rh  Rh3  1  0.500  0.500  0.000  1.0
[/CIF]
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