The structure described by SnOP2O5 crystallizes in the orthorhombic C222_1 space group. Sn(1) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form SnO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are three 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  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent Sn(1)O4 tetrahedra. In the second P site, P(2) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(1)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. In the third P site, P(3) is bonded to two equivalent O(1) and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(1)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(3) atom. In the second O site, O(6) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the third O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fifth O site, O(3) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(1) atom. is represented by the CIF card [CIF]
data_Sn(PO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.080
_cell_length_b   8.080
_cell_length_c   9.774
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.157
_symmetry_Int_Tables_number   1
_cell_volume   638.147
_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  0.189  0.647  0.491  1.0
  Sn  Sn1  1  0.647  0.189  0.509  1.0
  Sn  Sn2  1  0.353  0.811  0.009  1.0
  Sn  Sn3  1  0.811  0.353  0.991  1.0
  P  P4  1  0.118  0.340  0.238  1.0
  P  P5  1  0.340  0.118  0.762  1.0
  P  P6  1  0.352  0.352  0.000  1.0
  P  P7  1  0.972  0.028  0.750  1.0
  P  P8  1  0.028  0.972  0.250  1.0
  P  P9  1  0.648  0.648  0.500  1.0
  P  P10  1  0.882  0.660  0.738  1.0
  P  P11  1  0.660  0.882  0.262  1.0
  O  O12  1  0.038  0.168  0.287  1.0
  O  O13  1  0.168  0.038  0.713  1.0
  O  O14  1  0.210  0.414  0.359  1.0
  O  O15  1  0.414  0.210  0.641  1.0
  O  O16  1  0.251  0.275  0.127  1.0
  O  O17  1  0.275  0.251  0.873  1.0
  O  O18  1  0.013  0.553  0.673  1.0
  O  O19  1  0.553  0.013  0.327  1.0
  O  O20  1  0.877  0.064  0.621  1.0
  O  O21  1  0.064  0.877  0.379  1.0
  O  O22  1  0.530  0.305  0.020  1.0
  O  O23  1  0.305  0.530  0.980  1.0
  O  O24  1  0.470  0.695  0.520  1.0
  O  O25  1  0.695  0.470  0.480  1.0
  O  O26  1  0.936  0.123  0.879  1.0
  O  O27  1  0.123  0.936  0.121  1.0
  O  O28  1  0.447  0.987  0.827  1.0
  O  O29  1  0.987  0.447  0.173  1.0
  O  O30  1  0.749  0.725  0.627  1.0
  O  O31  1  0.725  0.749  0.373  1.0
  O  O32  1  0.790  0.586  0.859  1.0
  O  O33  1  0.586  0.790  0.141  1.0
  O  O34  1  0.832  0.962  0.213  1.0
  O  O35  1  0.962  0.832  0.787  1.0
[/CIF]
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The structure described by SnOP2O5 crystallizes in the orthorhombic C222_1 space group. Sn(1) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form SnO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are three 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  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent Sn(1)O4 tetrahedra. In the second P site, P(2) is bonded to two equivalent O(3) and two equivalent O(6) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(1)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. In the third P site, P(3) is bonded to two equivalent O(1) and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Sn(1)O4 tetrahedra and corners with two equivalent P(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(3) atom. In the second O site, O(6) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the third O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the fifth O site, O(3) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sn(1) and one P(1) atom. is represented by the CIF card [CIF]
data_Sn(PO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.080
_cell_length_b   8.080
_cell_length_c   9.774
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.157
_symmetry_Int_Tables_number   1
_cell_volume   638.147
_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  0.189  0.647  0.491  1.0
  Sn  Sn1  1  0.647  0.189  0.509  1.0
  Sn  Sn2  1  0.353  0.811  0.009  1.0
  Sn  Sn3  1  0.811  0.353  0.991  1.0
  P  P4  1  0.118  0.340  0.238  1.0
  P  P5  1  0.340  0.118  0.762  1.0
  P  P6  1  0.352  0.352  0.000  1.0
  P  P7  1  0.972  0.028  0.750  1.0
  P  P8  1  0.028  0.972  0.250  1.0
  P  P9  1  0.648  0.648  0.500  1.0
  P  P10  1  0.882  0.660  0.738  1.0
  P  P11  1  0.660  0.882  0.262  1.0
  O  O12  1  0.038  0.168  0.287  1.0
  O  O13  1  0.168  0.038  0.713  1.0
  O  O14  1  0.210  0.414  0.359  1.0
  O  O15  1  0.414  0.210  0.641  1.0
  O  O16  1  0.251  0.275  0.127  1.0
  O  O17  1  0.275  0.251  0.873  1.0
  O  O18  1  0.013  0.553  0.673  1.0
  O  O19  1  0.553  0.013  0.327  1.0
  O  O20  1  0.877  0.064  0.621  1.0
  O  O21  1  0.064  0.877  0.379  1.0
  O  O22  1  0.530  0.305  0.020  1.0
  O  O23  1  0.305  0.530  0.980  1.0
  O  O24  1  0.470  0.695  0.520  1.0
  O  O25  1  0.695  0.470  0.480  1.0
  O  O26  1  0.936  0.123  0.879  1.0
  O  O27  1  0.123  0.936  0.121  1.0
  O  O28  1  0.447  0.987  0.827  1.0
  O  O29  1  0.987  0.447  0.173  1.0
  O  O30  1  0.749  0.725  0.627  1.0
  O  O31  1  0.725  0.749  0.373  1.0
  O  O32  1  0.790  0.586  0.859  1.0
  O  O33  1  0.586  0.790  0.141  1.0
  O  O34  1  0.832  0.962  0.213  1.0
  O  O35  1  0.962  0.832  0.787  1.0
[/CIF]
.