data_YIrPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.44
_cell_length_b   3.44
_cell_length_c   8.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   YIrPb2
_chemical_formula_sum   'Y1 Ir1 Pb2'
_cell_volume   102.83
_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  0.83  1.0
  Ir  Ir0  1  0.72  0.72  0.36  1.0
  Pb  Pb1  1  0.0  0.0  0.21  1.0
  Pb  Pb2  1  0.72  0.72  0.29  1.0

data_YIrPb2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.87
_cell_length_b   4.87
_cell_length_c   8.68
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   YIrPb2
_chemical_formula_sum   'Y2 Ir2 Pb4'
_cell_volume   205.65
_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  0.83  1.0
  Ir  Ir1  2  0.22  0.5  0.36  1.0
  Pb  Pb2  2  0.0  0.0  0.21  1.0
  Pb  Pb3  2  0.22  0.5  0.29  1.0

Y Ir Pb Pb
Y Ir Pb Pb 0 0 + o o 0 0 o + o 0 2 o o + 1 3 o o o 2 3 - - o 
YIrPb2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two YIrPb2 clusters. Y(1) is bonded in a distorted single-bond geometry to one Pb(1) atom. The Y(1)-Pb(1) bond length is 3.35 Å. Ir(1) is bonded in a single-bond geometry to one Pb(2) atom. The Ir(1)-Pb(2) bond length is 0.61 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a distorted bent 120 degrees geometry to one Y(1) and one Pb(2) atom. The Pb(1)-Pb(2) bond length is 1.52 Å. In the second Pb site, Pb(2) is bonded in a single-bond geometry to one Ir(1) and one Pb(1) atom.