data_Sr(PPb)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.3
_cell_length_b   6.3
_cell_length_c   6.3
_cell_angle_alpha   129.21
_cell_angle_beta   129.21
_cell_angle_gamma   74.67
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr(PPb)2
_chemical_formula_sum   'Sr1 P2 Pb2'
_cell_volume   146.26
_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  Sr4  1  0.0  0.0  0.0  1.0
  P  P0  1  0.0  0.7  0.5  1.0
  P  P1  1  0.7  0.0  0.5  1.0
  Pb  Pb2  1  0.0  0.0  0.59  1.0
  Pb  Pb3  1  0.0  0.0  0.42  1.0

data_Sr(PPb)2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.64
_cell_length_b   7.64
_cell_length_c   6.3
_cell_angle_alpha   90.0
_cell_angle_beta   127.33
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Sr(PPb)2
_chemical_formula_sum   'Sr2 P4 Pb4'
_cell_volume   292.53
_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
  P  P1  4  0.15  0.15  0.8  1.0
  Pb  Pb2  2  0.0  0.0  0.42  1.0
  Pb  Pb3  2  0.0  0.0  0.59  1.0

Sr P P Pb Pb
Sr(PbP)2 crystallizes in the monoclinic Cm space group. Sr(1) is bonded in a 6-coordinate geometry to one Pb(1), one Pb(2), and four equivalent P(1) atoms. The Sr(1)-Pb(1) bond length is 2.55 Å. The Sr(1)-Pb(2) bond length is 2.67 Å. There are two shorter (2.42 Å) and two longer (3.45 Å) Sr(1)-P(1) bond lengths. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 4-coordinate geometry to one Sr(1), one Pb(2), and two equivalent P(1) atoms. The Pb(1)-Pb(2) bond length is 1.08 Å. Both Pb(1)-P(1) bond lengths are 1.58 Å. In the second Pb site, Pb(2) is bonded in a linear geometry to one Sr(1) and one Pb(1) atom. P(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Pb(1) atom.