data_HgRh3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.87
_cell_length_b   4.87
_cell_length_c   2.82
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   109.62
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HgRh3
_chemical_formula_sum   'Hg1 Rh3'
_cell_volume   62.83
_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
  Hg  Hg0  1  0.8  0.0  0.0  1.0
  Rh  Rh1  1  0.4  0.99  0.41  1.0
  Rh  Rh2  1  0.4  0.01  0.41  1.0
  Rh  Rh3  1  0.0  0.0  0.0  1.0

data_HgRh3
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.82
_cell_length_b   4.87
_cell_length_c   4.87
_cell_angle_alpha   109.62
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HgRh3
_chemical_formula_sum   'Hg1 Rh3'
_cell_volume   62.83
_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
  Hg  Hg0  1  0.0  0.8  0.0  1.0
  Rh  Rh1  1  0.0  0.0  0.0  1.0
  Rh  Rh2  1  0.41  0.4  0.01  1.0
  Rh  Rh3  1  0.41  0.4  0.99  1.0

Hg Rh Rh Rh
(Rh)2Rh(Hg) is alpha carbon monoxide-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one rhodium molecule and one Rh(Hg) cluster. In the Rh(Hg) cluster, Rh(3) is bonded in a single-bond geometry to one Hg(1) atom. The Rh(3)-Hg(1) bond length is 0.95 Å. Hg(1) is bonded in a single-bond geometry to one Rh(3) atom.