The crystal structure described by PbSnP2O8 crystallizes in the monoclinic P2_1/c space group. Pb(1) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(8), and two equivalent O(4) atoms. Sn(1) is bonded to one O(1), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form SnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-49°. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-47°. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Pb(1) and one P(2) atom. In the second O site, O(6) is bonded in a 2-coordinate geometry to one Pb(1), one Sn(1), and one P(2) atom. In the third O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the fourth O site, O(8) is bonded in a 2-coordinate geometry to one Pb(1), one Sn(1), and one P(2) atom. In the fifth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the sixth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(1) atom. In the seventh O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the eighth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SnP2PbO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.073
_cell_length_b   4.931
_cell_length_c   10.019
_cell_angle_alpha   63.215
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   664.704
_cell_formula_units_Z   4
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
  Sn  Sn0  1  0.142  0.186  0.550  1.0
  Sn  Sn1  1  0.642  0.814  0.950  1.0
  Sn  Sn2  1  0.858  0.814  0.450  1.0
  Sn  Sn3  1  0.358  0.186  0.050  1.0
  P  P4  1  0.023  0.553  0.703  1.0
  P  P5  1  0.523  0.447  0.797  1.0
  P  P6  1  0.977  0.447  0.297  1.0
  P  P7  1  0.477  0.553  0.203  1.0
  P  P8  1  0.737  0.172  0.609  1.0
  P  P9  1  0.237  0.828  0.891  1.0
  P  P10  1  0.263  0.828  0.391  1.0
  P  P11  1  0.763  0.172  0.109  1.0
  Pb  Pb12  1  0.399  0.125  0.589  1.0
  Pb  Pb13  1  0.899  0.875  0.911  1.0
  Pb  Pb14  1  0.601  0.875  0.411  1.0
  Pb  Pb15  1  0.101  0.125  0.089  1.0
  O  O16  1  0.107  0.432  0.661  1.0
  O  O17  1  0.607  0.568  0.839  1.0
  O  O18  1  0.893  0.568  0.339  1.0
  O  O19  1  0.393  0.432  0.161  1.0
  O  O20  1  0.039  0.894  0.662  1.0
  O  O21  1  0.539  0.106  0.838  1.0
  O  O22  1  0.961  0.106  0.338  1.0
  O  O23  1  0.461  0.894  0.162  1.0
  O  O24  1  0.938  0.523  0.624  1.0
  O  O25  1  0.438  0.477  0.876  1.0
  O  O26  1  0.062  0.477  0.376  1.0
  O  O27  1  0.562  0.523  0.124  1.0
  O  O28  1  0.505  0.629  0.627  1.0
  O  O29  1  0.005  0.371  0.873  1.0
  O  O30  1  0.495  0.371  0.373  1.0
  O  O31  1  0.995  0.629  0.127  1.0
  O  O32  1  0.848  0.109  0.049  1.0
  O  O33  1  0.348  0.891  0.451  1.0
  O  O34  1  0.152  0.891  0.951  1.0
  O  O35  1  0.652  0.109  0.549  1.0
  O  O36  1  0.750  0.527  0.035  1.0
  O  O37  1  0.250  0.473  0.465  1.0
  O  O38  1  0.250  0.473  0.965  1.0
  O  O39  1  0.750  0.527  0.535  1.0
  O  O40  1  0.679  0.017  0.083  1.0
  O  O41  1  0.179  0.983  0.417  1.0
  O  O42  1  0.321  0.983  0.917  1.0
  O  O43  1  0.821  0.017  0.583  1.0
  O  O44  1  0.266  0.935  0.217  1.0
  O  O45  1  0.766  0.065  0.283  1.0
  O  O46  1  0.734  0.065  0.783  1.0
  O  O47  1  0.234  0.935  0.717  1.0
[/CIF]
.
The crystal structure described by PbSnP2O8 crystallizes in the monoclinic P2_1/c space group. Pb(1) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(8), and two equivalent O(4) atoms. Sn(1) is bonded to one O(1), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form SnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-49°. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-47°. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Pb(1) and one P(2) atom. In the second O site, O(6) is bonded in a 2-coordinate geometry to one Pb(1), one Sn(1), and one P(2) atom. In the third O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the fourth O site, O(8) is bonded in a 2-coordinate geometry to one Pb(1), one Sn(1), and one P(2) atom. In the fifth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the sixth O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(1) atom. In the seventh O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the eighth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_SnP2PbO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   15.073
_cell_length_b   4.931
_cell_length_c   10.019
_cell_angle_alpha   63.215
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   664.704
_cell_formula_units_Z   4
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
  Sn  Sn0  1  0.142  0.186  0.550  1.0
  Sn  Sn1  1  0.642  0.814  0.950  1.0
  Sn  Sn2  1  0.858  0.814  0.450  1.0
  Sn  Sn3  1  0.358  0.186  0.050  1.0
  P  P4  1  0.023  0.553  0.703  1.0
  P  P5  1  0.523  0.447  0.797  1.0
  P  P6  1  0.977  0.447  0.297  1.0
  P  P7  1  0.477  0.553  0.203  1.0
  P  P8  1  0.737  0.172  0.609  1.0
  P  P9  1  0.237  0.828  0.891  1.0
  P  P10  1  0.263  0.828  0.391  1.0
  P  P11  1  0.763  0.172  0.109  1.0
  Pb  Pb12  1  0.399  0.125  0.589  1.0
  Pb  Pb13  1  0.899  0.875  0.911  1.0
  Pb  Pb14  1  0.601  0.875  0.411  1.0
  Pb  Pb15  1  0.101  0.125  0.089  1.0
  O  O16  1  0.107  0.432  0.661  1.0
  O  O17  1  0.607  0.568  0.839  1.0
  O  O18  1  0.893  0.568  0.339  1.0
  O  O19  1  0.393  0.432  0.161  1.0
  O  O20  1  0.039  0.894  0.662  1.0
  O  O21  1  0.539  0.106  0.838  1.0
  O  O22  1  0.961  0.106  0.338  1.0
  O  O23  1  0.461  0.894  0.162  1.0
  O  O24  1  0.938  0.523  0.624  1.0
  O  O25  1  0.438  0.477  0.876  1.0
  O  O26  1  0.062  0.477  0.376  1.0
  O  O27  1  0.562  0.523  0.124  1.0
  O  O28  1  0.505  0.629  0.627  1.0
  O  O29  1  0.005  0.371  0.873  1.0
  O  O30  1  0.495  0.371  0.373  1.0
  O  O31  1  0.995  0.629  0.127  1.0
  O  O32  1  0.848  0.109  0.049  1.0
  O  O33  1  0.348  0.891  0.451  1.0
  O  O34  1  0.152  0.891  0.951  1.0
  O  O35  1  0.652  0.109  0.549  1.0
  O  O36  1  0.750  0.527  0.035  1.0
  O  O37  1  0.250  0.473  0.465  1.0
  O  O38  1  0.250  0.473  0.965  1.0
  O  O39  1  0.750  0.527  0.535  1.0
  O  O40  1  0.679  0.017  0.083  1.0
  O  O41  1  0.179  0.983  0.417  1.0
  O  O42  1  0.321  0.983  0.917  1.0
  O  O43  1  0.821  0.017  0.583  1.0
  O  O44  1  0.266  0.935  0.217  1.0
  O  O45  1  0.766  0.065  0.283  1.0
  O  O46  1  0.734  0.065  0.783  1.0
  O  O47  1  0.234  0.935  0.717  1.0
[/CIF]
.