data_SrCrPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.73
_cell_length_b   3.73
_cell_length_c   7.99
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrCrPb2
_chemical_formula_sum   'Sr1 Cr1 Pb2'
_cell_volume   111.32
_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  0.87  0.87  0.13  1.0
  Cr  Cr0  1  0.0  0.0  0.77  1.0
  Pb  Pb1  1  0.87  0.87  0.41  1.0
  Pb  Pb2  1  0.0  0.0  0.67  1.0

data_SrCrPb2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.28
_cell_length_b   5.28
_cell_length_c   7.99
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrCrPb2
_chemical_formula_sum   'Sr2 Cr2 Pb4'
_cell_volume   222.64
_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  0.37  0.5  0.13  1.0
  Cr  Cr1  2  0.0  0.0  0.77  1.0
  Pb  Pb2  2  0.0  0.0  0.67  1.0
  Pb  Pb3  2  0.37  0.5  0.41  1.0

Sr Cr Pb Pb
Sr Cr Pb Pb 0 2 o o o 1 3 o o o 2 3 + + o 
SrCrPb2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrCrPb2 clusters. Sr(1) is bonded in a 2-coordinate geometry to one Cr(1) and one Pb(1) atom. The Sr(1)-Cr(1) bond length is 2.94 Å. The Sr(1)-Pb(1) bond length is 2.24 Å. Cr(1) is bonded in a single-bond geometry to one Sr(1) and one Pb(2) atom. The Cr(1)-Pb(2) bond length is 0.77 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a distorted single-bond geometry to one Sr(1) atom. In the second Pb site, Pb(2) is bonded in a single-bond geometry to one Cr(1) atom.