data_Sr2BiPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.45
_cell_length_b   5.45
_cell_length_c   4.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2BiPb
_chemical_formula_sum   'Sr2 Bi1 Pb1'
_cell_volume   139.82
_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  Sr2  1  0.0  0.73  0.35  1.0
  Sr  Sr3  1  0.73  0.0  0.35  1.0
  Bi  Bi0  1  0.73  0.73  0.0  1.0
  Pb  Pb1  1  0.0  0.0  0.0  1.0

data_Sr2BiPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.71
_cell_length_b   7.71
_cell_length_c   4.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Sr2BiPb
_chemical_formula_sum   'Sr4 Bi2 Pb2'
_cell_volume   279.63
_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  4  0.36  0.36  0.35  1.0
  Bi  Bi1  2  0.23  0.5  0.0  1.0
  Pb  Pb2  2  0.0  0.0  0.0  1.0

Sr Sr Bi Pb
Sr2PbBi is alpha Po structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Sr2PbBi clusters. Sr(1) is bonded in a 2-coordinate geometry to one Pb(1) and one Bi(1) atom. The Sr(1)-Pb(1) bond length is 2.22 Å. The Sr(1)-Bi(1) bond length is 2.22 Å. Pb(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Bi(1) atom. The Pb(1)-Bi(1) bond length is 2.11 Å. Bi(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Pb(1) atom.