data_SrIr2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.58
_cell_length_b   4.58
_cell_length_c   3.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrIr2Pb
_chemical_formula_sum   'Sr1 Ir2 Pb1'
_cell_volume   82.51
_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
  Sr  Sr3  1  0.0  0.0  0.0  1.0
  Ir  Ir0  1  0.0  0.29  0.97  1.0
  Ir  Ir1  1  0.29  0.0  0.97  1.0
  Pb  Pb2  1  0.29  0.29  0.0  1.0

data_SrIr2Pb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.47
_cell_length_b   6.47
_cell_length_c   3.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrIr2Pb
_chemical_formula_sum   'Sr2 Ir4 Pb2'
_cell_volume   165.03
_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
  Sr  Sr0  2  0.0  0.0  0.0  1.0
  Ir  Ir1  4  0.14  0.14  0.97  1.0
  Pb  Pb2  2  0.29  0.0  0.0  1.0

Sr Ir Ir Pb
Sr Ir Ir Pb 0 2 o o - 0 1 o o - 1 3 o o + 2 3 o o + 
SrIr2Pb is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrIr2Pb clusters. Sr(1) is bonded in an L-shaped geometry to two equivalent Ir(1) atoms. Both Sr(1)-Ir(1) bond lengths are 1.32 Å. Ir(1) is bonded in a 2-coordinate geometry to one Sr(1) and one Pb(1) atom. The Ir(1)-Pb(1) bond length is 1.32 Å. Pb(1) is bonded in an L-shaped geometry to two equivalent Ir(1) atoms.