data_SrPb5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.45
_cell_length_b   4.45
_cell_length_c   11.49
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrPb5
_chemical_formula_sum   'Sr1 Pb5'
_cell_volume   227.7
_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  Sr5  1  0.0  0.0  0.0  1.0
  Pb  Pb0  1  0.23  0.23  0.1  1.0
  Pb  Pb1  1  0.23  0.23  0.39  1.0
  Pb  Pb2  1  0.0  0.0  0.49  1.0
  Pb  Pb3  1  0.0  0.0  0.01  1.0
  Pb  Pb4  1  0.23  0.23  0.75  1.0

data_SrPb5
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.29
_cell_length_b   6.29
_cell_length_c   11.49
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrPb5
_chemical_formula_sum   'Sr2 Pb10'
_cell_volume   455.4
_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
  Pb  Pb1  2  0.0  0.0  0.01  1.0
  Pb  Pb2  2  0.0  0.0  0.49  1.0
  Pb  Pb3  2  0.23  0.0  0.1  1.0
  Pb  Pb4  2  0.23  0.0  0.39  1.0
  Pb  Pb5  2  0.23  0.0  0.75  1.0

Sr Pb Pb Pb Pb Pb
Pb3Sr(Pb)2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two diplumbyne molecules and two Pb3Sr clusters. In each Pb3Sr cluster, Sr(1) is bonded in a single-bond geometry to one Pb(4) and one Pb(5) atom. The Sr(1)-Pb(4) bond length is 0.06 Å. The Sr(1)-Pb(5) bond length is 3.24 Å. There are three inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a distorted single-bond geometry to one Pb(4) atom. The Pb(1)-Pb(4) bond length is 1.78 Å. In the second Pb site, Pb(4) is bonded in a single-bond geometry to one Sr(1) and one Pb(1) atom. In the third Pb site, Pb(5) is bonded in a distorted single-bond geometry to one Sr(1) atom.