The material described by Sn(PO3)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(12), one O(15), one O(17), one O(4), one O(6), and one O(7) atom to form SnO6 octahedra that share  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the second Sn site, Sn(2) is bonded in a rectangular see-saw-like geometry to one O(11), one O(13), one O(3), and one O(9) atom. There are six inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(14), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-45°. In the second P site, P(2) is bonded to one O(12), one O(15), one O(18), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 10-50°. In the third P site, P(3) is bonded to one O(14), one O(16), one O(5), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(1), one O(13), one O(18), and one O(2) atom to form corner-sharing PO4 tetrahedra. In the fifth P site, P(5) is bonded to one O(1), one O(10), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. In the sixth P site, P(6) is bonded to one O(11), one O(16), one O(17), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(4) and one P(5) atom. In the second O site, O(2) is bonded in a single-bond geometry to one P(4) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sn(2) and one P(5) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(5) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one P(3) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(2) and one P(6) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Sn(2) and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one P(1) and one P(5) atom. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one Sn(2) and one P(6) atom. In the twelfth O site, O(12) is bonded in a linear geometry to one Sn(1) and one P(2) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one Sn(2) and one P(4) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(2) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one P(3) and one P(6) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(6) atom. In the eighteenth O site, O(18) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. is represented by the CIF card [CIF]
data_Sn(PO3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.483
_cell_length_b   10.202
_cell_length_c   10.585
_cell_angle_alpha   109.034
_cell_angle_beta   109.553
_cell_angle_gamma   105.685
_symmetry_Int_Tables_number   1
_cell_volume   825.271
_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  0.235  0.737  0.271  1.0
  Sn  Sn1  1  0.765  0.263  0.729  1.0
  Sn  Sn2  1  0.698  0.862  0.808  1.0
  Sn  Sn3  1  0.302  0.138  0.192  1.0
  P  P4  1  0.620  0.977  0.373  1.0
  P  P5  1  0.850  0.491  0.107  1.0
  P  P6  1  0.150  0.509  0.893  1.0
  P  P7  1  0.796  0.038  0.191  1.0
  P  P8  1  0.684  0.444  0.299  1.0
  P  P9  1  0.579  0.684  0.401  1.0
  P  P10  1  0.316  0.556  0.701  1.0
  P  P11  1  0.204  0.962  0.809  1.0
  P  P12  1  0.380  0.023  0.627  1.0
  P  P13  1  0.421  0.316  0.599  1.0
  P  P14  1  0.902  0.786  0.099  1.0
  P  P15  1  0.098  0.214  0.901  1.0
  O  O16  1  0.391  0.428  0.721  1.0
  O  O17  1  0.168  0.493  0.558  1.0
  O  O18  1  0.345  0.307  0.448  1.0
  O  O19  1  0.392  0.642  0.334  1.0
  O  O20  1  0.068  0.814  0.692  1.0
  O  O21  1  0.728  0.130  0.514  1.0
  O  O22  1  0.433  0.928  0.318  1.0
  O  O23  1  0.196  0.371  0.903  1.0
  O  O24  1  0.702  0.999  0.028  1.0
  O  O25  1  0.332  0.153  0.598  1.0
  O  O26  1  0.567  0.072  0.682  1.0
  O  O27  1  0.850  0.769  0.942  1.0
  O  O28  1  0.811  0.381  0.952  1.0
  O  O29  1  0.466  0.703  0.763  1.0
  O  O30  1  0.647  0.984  0.239  1.0
  O  O31  1  0.832  0.507  0.442  1.0
  O  O32  1  0.655  0.693  0.552  1.0
  O  O33  1  0.189  0.619  0.048  1.0
  O  O34  1  0.970  0.441  0.773  1.0
  O  O35  1  0.150  0.231  0.058  1.0
  O  O36  1  0.932  0.186  0.308  1.0
  O  O37  1  0.149  0.103  0.804  1.0
  O  O38  1  0.851  0.897  0.196  1.0
  O  O39  1  0.030  0.559  0.227  1.0
  O  O40  1  0.608  0.358  0.666  1.0
  O  O41  1  0.353  0.016  0.761  1.0
  O  O42  1  0.609  0.572  0.279  1.0
  O  O43  1  0.912  0.164  0.809  1.0
  O  O44  1  0.272  0.870  0.486  1.0
  O  O45  1  0.298  0.001  0.972  1.0
  O  O46  1  0.534  0.297  0.236  1.0
  O  O47  1  0.804  0.629  0.097  1.0
  O  O48  1  0.275  0.589  0.848  1.0
  O  O49  1  0.668  0.847  0.402  1.0
  O  O50  1  0.088  0.836  0.191  1.0
  O  O51  1  0.725  0.411  0.152  1.0
[/CIF]
.
The material described by Sn(PO3)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to one O(12), one O(15), one O(17), one O(4), one O(6), and one O(7) atom to form SnO6 octahedra that share  a cornercorner with one P(5)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. In the second Sn site, Sn(2) is bonded in a rectangular see-saw-like geometry to one O(11), one O(13), one O(3), and one O(9) atom. There are six inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(14), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-45°. In the second P site, P(2) is bonded to one O(12), one O(15), one O(18), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(6)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 10-50°. In the third P site, P(3) is bonded to one O(14), one O(16), one O(5), and one O(9) atom to form corner-sharing PO4 tetrahedra. In the fourth P site, P(4) is bonded to one O(1), one O(13), one O(18), and one O(2) atom to form corner-sharing PO4 tetrahedra. In the fifth P site, P(5) is bonded to one O(1), one O(10), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. In the sixth P site, P(6) is bonded to one O(11), one O(16), one O(17), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 44°. There are eighteen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one P(4) and one P(5) atom. In the second O site, O(2) is bonded in a single-bond geometry to one P(4) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Sn(2) and one P(5) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(5) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one P(3) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(2) and one P(6) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Sn(2) and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one P(1) and one P(5) atom. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one Sn(2) and one P(6) atom. In the twelfth O site, O(12) is bonded in a linear geometry to one Sn(1) and one P(2) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one Sn(2) and one P(4) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one P(1) and one P(3) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(2) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one P(3) and one P(6) atom. In the seventeenth O site, O(17) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(6) atom. In the eighteenth O site, O(18) is bonded in a bent 150 degrees geometry to one P(2) and one P(4) atom. is represented by the CIF card [CIF]
data_Sn(PO3)3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.483
_cell_length_b   10.202
_cell_length_c   10.585
_cell_angle_alpha   109.034
_cell_angle_beta   109.553
_cell_angle_gamma   105.685
_symmetry_Int_Tables_number   1
_cell_volume   825.271
_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  0.235  0.737  0.271  1.0
  Sn  Sn1  1  0.765  0.263  0.729  1.0
  Sn  Sn2  1  0.698  0.862  0.808  1.0
  Sn  Sn3  1  0.302  0.138  0.192  1.0
  P  P4  1  0.620  0.977  0.373  1.0
  P  P5  1  0.850  0.491  0.107  1.0
  P  P6  1  0.150  0.509  0.893  1.0
  P  P7  1  0.796  0.038  0.191  1.0
  P  P8  1  0.684  0.444  0.299  1.0
  P  P9  1  0.579  0.684  0.401  1.0
  P  P10  1  0.316  0.556  0.701  1.0
  P  P11  1  0.204  0.962  0.809  1.0
  P  P12  1  0.380  0.023  0.627  1.0
  P  P13  1  0.421  0.316  0.599  1.0
  P  P14  1  0.902  0.786  0.099  1.0
  P  P15  1  0.098  0.214  0.901  1.0
  O  O16  1  0.391  0.428  0.721  1.0
  O  O17  1  0.168  0.493  0.558  1.0
  O  O18  1  0.345  0.307  0.448  1.0
  O  O19  1  0.392  0.642  0.334  1.0
  O  O20  1  0.068  0.814  0.692  1.0
  O  O21  1  0.728  0.130  0.514  1.0
  O  O22  1  0.433  0.928  0.318  1.0
  O  O23  1  0.196  0.371  0.903  1.0
  O  O24  1  0.702  0.999  0.028  1.0
  O  O25  1  0.332  0.153  0.598  1.0
  O  O26  1  0.567  0.072  0.682  1.0
  O  O27  1  0.850  0.769  0.942  1.0
  O  O28  1  0.811  0.381  0.952  1.0
  O  O29  1  0.466  0.703  0.763  1.0
  O  O30  1  0.647  0.984  0.239  1.0
  O  O31  1  0.832  0.507  0.442  1.0
  O  O32  1  0.655  0.693  0.552  1.0
  O  O33  1  0.189  0.619  0.048  1.0
  O  O34  1  0.970  0.441  0.773  1.0
  O  O35  1  0.150  0.231  0.058  1.0
  O  O36  1  0.932  0.186  0.308  1.0
  O  O37  1  0.149  0.103  0.804  1.0
  O  O38  1  0.851  0.897  0.196  1.0
  O  O39  1  0.030  0.559  0.227  1.0
  O  O40  1  0.608  0.358  0.666  1.0
  O  O41  1  0.353  0.016  0.761  1.0
  O  O42  1  0.609  0.572  0.279  1.0
  O  O43  1  0.912  0.164  0.809  1.0
  O  O44  1  0.272  0.870  0.486  1.0
  O  O45  1  0.298  0.001  0.972  1.0
  O  O46  1  0.534  0.297  0.236  1.0
  O  O47  1  0.804  0.629  0.097  1.0
  O  O48  1  0.275  0.589  0.848  1.0
  O  O49  1  0.668  0.847  0.402  1.0
  O  O50  1  0.088  0.836  0.191  1.0
  O  O51  1  0.725  0.411  0.152  1.0
[/CIF]
.