data_CdRh3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.8
_cell_length_b   2.8
_cell_length_c   9.06
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CdRh3
_chemical_formula_sum   'Cd1 Rh3'
_cell_volume   61.7
_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
  Cd  Cd0  1  0.0  0.0  0.53  1.0
  Rh  Rh1  1  0.0  0.0  0.0  1.0
  Rh  Rh2  1  0.0  0.62  0.91  1.0
  Rh  Rh3  1  0.0  0.62  0.15  1.0

data_CdRh3
_symmetry_space_group_name_H-M   Cm
_cell_length_a   2.8
_cell_length_b   4.86
_cell_length_c   9.06
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CdRh3
_chemical_formula_sum   'Cd2 Rh6'
_cell_volume   123.41
_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
  Cd  Cd0  2  0.0  0.0  0.53  1.0
  Rh  Rh1  2  0.0  0.0  0.0  1.0
  Rh  Rh2  2  0.12  0.5  0.15  1.0
  Rh  Rh3  2  0.12  0.5  0.91  1.0

Cd Rh Rh Rh
Rh3Cd crystallizes in the monoclinic Cm space group. There are three inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 1-coordinate geometry to one Rh(3) and two equivalent Rh(2) atoms. The Rh(1)-Rh(3) bond length is 1.76 Å. There is one shorter (1.36 Å) and one longer (1.93 Å) Rh(1)-Rh(2) bond length. In the second Rh site, Rh(2) is bonded in a distorted bent 120 degrees geometry to two equivalent Rh(1) and one Cd(1) atom. The Rh(2)-Cd(1) bond length is 3.58 Å. In the third Rh site, Rh(3) is bonded in a 1-coordinate geometry to one Rh(1) and one Cd(1) atom. The Rh(3)-Cd(1) bond length is 3.58 Å. Cd(1) is bonded to one Rh(2), one Rh(3), and six equivalent Cd(1) atoms to form a mixture of distorted edge and corner-sharing CdCd6Rh2 hexagonal bipyramids. All Cd(1)-Cd(1) bond lengths are 2.80 Å.