data_YHgRh2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.38
_cell_length_b   4.38
_cell_length_c   3.82
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YHgRh2
_chemical_formula_sum   'Y1 Hg1 Rh2'
_cell_volume   73.12
_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
  Y  Y3  1  0.0  0.0  0.0  1.0
  Hg  Hg0  1  0.19  0.19  0.0  1.0
  Rh  Rh1  1  0.19  0.0  0.91  1.0
  Rh  Rh2  1  0.0  0.19  0.91  1.0

data_YHgRh2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.19
_cell_length_b   6.19
_cell_length_c   3.82
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   YHgRh2
_chemical_formula_sum   'Y2 Hg2 Rh4'
_cell_volume   146.24
_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
  Y  Y0  2  0.0  0.0  0.0  1.0
  Hg  Hg1  2  0.19  0.0  0.0  1.0
  Rh  Rh2  4  0.09  0.09  0.91  1.0

Y Hg Rh Rh
YRh2Hg is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two YRh2Hg clusters. Y(1) is bonded in a distorted L-shaped geometry to two equivalent Rh(1) atoms. Both Y(1)-Rh(1) bond lengths are 0.89 Å. Rh(1) is bonded in a distorted L-shaped geometry to one Y(1) and one Hg(1) atom. The Rh(1)-Hg(1) bond length is 0.89 Å. Hg(1) is bonded in a 2-coordinate geometry to two equivalent Rh(1) atoms.