data_Ir2OsPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.85
_cell_length_b   4.85
_cell_length_c   2.86
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ir2OsPb
_chemical_formula_sum   'Ir2 Os1 Pb1'
_cell_volume   67.34
_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
  Ir  Ir0  1  0.43  0.0  0.43  1.0
  Ir  Ir1  1  0.0  0.43  0.43  1.0
  Os  Os2  1  0.0  0.0  0.0  1.0
  Pb  Pb3  1  0.43  0.43  0.0  1.0

data_Ir2OsPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.86
_cell_length_b   6.86
_cell_length_c   2.86
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ir2OsPb
_chemical_formula_sum   'Ir4 Os2 Pb2'
_cell_volume   134.67
_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
  Ir  Ir0  4  0.21  0.21  0.43  1.0
  Os  Os1  2  0.0  0.0  0.0  1.0
  Pb  Pb2  2  0.43  0.0  0.0  1.0

Ir Ir Os Pb
OsIr2Pb crystallizes in the monoclinic Cm space group. Os(1) is bonded in a 11-coordinate geometry to two equivalent Os(1), eight equivalent Ir(1), and one Pb(1) atom. Both Os(1)-Os(1) bond lengths are 2.86 Å. There are a spread of Os(1)-Ir(1) bond distances ranging from 2.41-3.22 Å. The Os(1)-Pb(1) bond length is 2.93 Å. Ir(1) is bonded in a 1-coordinate geometry to four equivalent Os(1) and two equivalent Pb(1) atoms. There is one shorter (2.41 Å) and one longer (2.64 Å) Ir(1)-Pb(1) bond length. Pb(1) is bonded in a 4-coordinate geometry to one Os(1) and four equivalent Ir(1) atoms.