data_CuSn2Rh
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.79
_cell_length_b   4.79
_cell_length_c   4.79
_cell_angle_alpha   124.35
_cell_angle_beta   124.35
_cell_angle_gamma   82.61
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CuSn2Rh
_chemical_formula_sum   'Cu1 Sn2 Rh1'
_cell_volume   71.91
_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
  Cu  Cu0  1  0.0  0.0  0.0  1.0
  Sn  Sn2  1  0.0  0.24  0.8  1.0
  Sn  Sn3  1  0.24  0.0  0.8  1.0
  Rh  Rh1  1  0.0  0.0  0.6  1.0

data_CuSn2Rh
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.32
_cell_length_b   6.32
_cell_length_c   4.79
_cell_angle_alpha   90.0
_cell_angle_beta   131.3
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CuSn2Rh
_chemical_formula_sum   'Cu2 Sn4 Rh2'
_cell_volume   143.82
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Cu  Cu0  2  0.0  0.0  0.0  1.0
  Sn  Sn1  4  0.38  0.38  0.56  1.0
  Rh  Rh2  2  0.0  0.0  0.6  1.0

Cu Sn Sn Rh
RhCuSn2 crystallizes in the monoclinic Cm space group. Rh(1) is bonded in a water-like geometry to two equivalent Cu(1) and two equivalent Sn(1) atoms. There is one shorter (1.93 Å) and one longer (2.86 Å) Rh(1)-Cu(1) bond length. Both Rh(1)-Sn(1) bond lengths are 0.99 Å. Cu(1) is bonded in a 6-coordinate geometry to two equivalent Rh(1) and four equivalent Sn(1) atoms. There are two shorter (1.85 Å) and two longer (3.22 Å) Cu(1)-Sn(1) bond lengths. Sn(1) is bonded in a single-bond geometry to one Rh(1) and two equivalent Cu(1) atoms.