data_HgBRh2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.31
_cell_length_b   4.31
_cell_length_c   3.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HgBRh2
_chemical_formula_sum   'Hg1 B1 Rh2'
_cell_volume   57.38
_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  Hg1  1  0.16  0.16  0.0  1.0
  B  B0  1  0.0  0.0  0.0  1.0
  Rh  Rh2  1  0.16  0.0  0.54  1.0
  Rh  Rh3  1  0.0  0.16  0.54  1.0

data_HgBRh2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.1
_cell_length_b   6.1
_cell_length_c   3.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HgBRh2
_chemical_formula_sum   'Hg2 B2 Rh4'
_cell_volume   114.75
_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
  Hg  Hg0  2  0.16  0.0  0.0  1.0
  B  B1  2  0.0  0.0  0.0  1.0
  Rh  Rh2  4  0.08  0.08  0.54  1.0

Hg B Rh Rh
(Rh)2HgB crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two HgB clusters and two Rh clusters. In each HgB cluster, Hg(1) is bonded in a single-bond geometry to one B(1) atom. The Hg(1)-B(1) bond length is 0.96 Å. B(1) is bonded in a single-bond geometry to one Hg(1) atom. In each Rh cluster, Rh(1) is bonded in a distorted single-bond geometry to one Rh(1) atom. The Rh(1)-Rh(1) bond length is 0.96 Å.