data_HgIrPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.17
_cell_length_b   5.17
_cell_length_c   3.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HgIrPb2
_chemical_formula_sum   'Hg1 Ir1 Pb2'
_cell_volume   93.65
_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  0.58  0.58  0.0  1.0
  Ir  Ir1  1  0.0  0.0  0.0  1.0
  Pb  Pb2  1  0.0  0.58  0.75  1.0
  Pb  Pb3  1  0.58  0.0  0.75  1.0

data_HgIrPb2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.31
_cell_length_b   7.31
_cell_length_c   3.51
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HgIrPb2
_chemical_formula_sum   'Hg2 Ir2 Pb4'
_cell_volume   187.29
_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  0.08  0.5  0.0  1.0
  Ir  Ir1  2  0.0  0.0  0.0  1.0
  Pb  Pb2  4  0.29  0.29  0.75  1.0

Hg Ir Pb Pb
Hg Ir Pb Pb 0 2 + o - 0 3 o + - 1 3 - o - 1 2 o - - 
IrHgPb2 is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two IrHgPb2 clusters. Ir(1) is bonded in a 2-coordinate geometry to two equivalent Pb(1) atoms. Both Ir(1)-Pb(1) bond lengths are 2.32 Å. Hg(1) is bonded in a 2-coordinate geometry to two equivalent Pb(1) atoms. Both Hg(1)-Pb(1) bond lengths are 2.32 Å. Pb(1) is bonded in a 2-coordinate geometry to one Ir(1) and one Hg(1) atom.