data_BiIr2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.99
_cell_length_b   4.99
_cell_length_c   3.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BiIr2Pb
_chemical_formula_sum   'Bi1 Ir2 Pb1'
_cell_volume   79.99
_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
  Bi  Bi0  1  0.49  0.49  0.0  1.0
  Ir  Ir1  1  0.49  0.0  0.61  1.0
  Ir  Ir2  1  0.0  0.49  0.61  1.0
  Pb  Pb3  1  0.0  0.0  0.0  1.0

data_BiIr2Pb
_symmetry_space_group_name_H-M   P4mm
_cell_length_a   4.99
_cell_length_b   4.99
_cell_length_c   3.21
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   99
_chemical_formula_structural   BiIr2Pb
_chemical_formula_sum   'Bi1 Ir2 Pb1'
_cell_volume   79.99
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x, z'
  3  '-x, -y, z'
  4  'y, -x, z'
  5  '-x, y, z'
  6  'y, x, z'
  7  'x, -y, z'
  8  '-y, -x, 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
  Bi  Bi0  1  0.0  0.0  0.0  1.0
  Ir  Ir1  2  0.0  0.5  0.61  1.0
  Pb  Pb2  1  0.5  0.5  0.0  1.0

Bi Ir Ir Pb
Ir2PbBi is beta Np-derived structured and crystallizes in the monoclinic Cm space group. Ir(1) is bonded in a 8-coordinate geometry to four equivalent Pb(1) and four equivalent Bi(1) atoms. There are a spread of Ir(1)-Pb(1) bond distances ranging from 2.77-3.19 Å. There are a spread of Ir(1)-Bi(1) bond distances ranging from 2.77-3.19 Å. Pb(1) is bonded in a 8-coordinate geometry to eight equivalent Ir(1) atoms. Bi(1) is bonded in a 8-coordinate geometry to eight equivalent Ir(1) atoms.