data_SrGePb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.19
_cell_length_b   6.19
_cell_length_c   6.19
_cell_angle_alpha   134.48
_cell_angle_beta   134.48
_cell_angle_gamma   66.33
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrGePb2
_chemical_formula_sum   'Sr1 Ge1 Pb2'
_cell_volume   118.59
_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  0.18  1.0
  Ge  Ge0  1  0.0  0.0  0.0  1.0
  Pb  Pb1  1  0.39  0.0  0.59  1.0
  Pb  Pb2  1  0.0  0.39  0.59  1.0

data_SrGePb2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.77
_cell_length_b   6.77
_cell_length_c   6.19
_cell_angle_alpha   90.0
_cell_angle_beta   123.17
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrGePb2
_chemical_formula_sum   'Sr2 Ge2 Pb4'
_cell_volume   237.19
_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  0.18  1.0
  Ge  Ge1  2  0.0  0.0  0.0  1.0
  Pb  Pb2  4  0.3  0.3  0.2  1.0

Sr Ge Pb Pb
Sr Ge Pb Pb 0 1 o o o 0 2 o o o 0 3 o o o 
SrPb2Ge is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two SrPb2Ge clusters. Sr(1) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one Ge(1) atom. Both Sr(1)-Pb(1) bond lengths are 1.93 Å. The Sr(1)-Ge(1) bond length is 1.10 Å. Pb(1) is bonded in a single-bond geometry to one Sr(1) atom. Ge(1) is bonded in a single-bond geometry to one Sr(1) atom.