The compound described by SnPO4 crystallizes in the monoclinic Cc space group. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(4), and one O(7) atom. In the second Sn site, Sn(2) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(5) atom. In the third Sn site, Sn(3) is bonded to one O(10), one O(11), one O(6), one O(8), and one O(9) atom to form SnO5 trigonal bipyramids that share  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(2), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Sn(3)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(1), one O(11), one O(12), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Sn(3)O5 trigonal bipyramid. In the third P site, P(3) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Sn(3)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Sn(3) and one P(3) atom. In the second O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Sn(3) and one P(1) atom. In the third O site, O(10) is bonded in a bent 150 degrees geometry to one Sn(3) and one P(1) atom. In the fourth O site, O(11) is bonded in a bent 120 degrees geometry to one Sn(3) and one P(2) atom. In the fifth O site, O(12) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(2) atom. In the sixth O site, O(1) is bonded in a single-bond geometry to one P(2) atom. In the seventh O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sn(2) and one P(1) atom. In the eighth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sn(2) and one P(2) atom. In the ninth O site, O(4) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(3) atom. In the tenth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Sn(2) and one P(3) atom. In the eleventh O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Sn(3) and one P(3) atom. In the twelfth O site, O(7) 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_SnPO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.132
_cell_length_b   8.132
_cell_length_c   9.709
_cell_angle_alpha   89.739
_cell_angle_beta   89.739
_cell_angle_gamma   117.575
_symmetry_Int_Tables_number   1
_cell_volume   569.022
_cell_formula_units_Z   6
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  0.993  0.379  0.548  1.0
  Sn  Sn1  1  0.417  0.010  0.540  1.0
  Sn  Sn2  1  0.656  0.580  0.537  1.0
  Sn  Sn3  1  0.379  0.993  0.048  1.0
  Sn  Sn4  1  0.010  0.417  0.040  1.0
  Sn  Sn5  1  0.580  0.656  0.037  1.0
  P  P6  1  0.352  0.647  0.331  1.0
  P  P7  1  0.986  0.001  0.967  1.0
  P  P8  1  0.359  0.646  0.740  1.0
  P  P9  1  0.646  0.359  0.240  1.0
  P  P10  1  0.647  0.352  0.831  1.0
  P  P11  1  0.001  0.986  0.467  1.0
  O  O12  1  0.986  0.977  0.313  1.0
  O  O13  1  0.324  0.817  0.366  1.0
  O  O14  1  0.203  0.082  0.525  1.0
  O  O15  1  0.449  0.210  0.200  1.0
  O  O16  1  0.794  0.299  0.198  1.0
  O  O17  1  0.550  0.692  0.675  1.0
  O  O18  1  0.182  0.464  0.372  1.0
  O  O19  1  0.082  0.203  0.025  1.0
  O  O20  1  0.383  0.654  0.901  1.0
  O  O21  1  0.817  0.324  0.866  1.0
  O  O22  1  0.645  0.377  0.669  1.0
  O  O23  1  0.210  0.449  0.700  1.0
  O  O24  1  0.534  0.666  0.393  1.0
  O  O25  1  0.913  0.782  0.535  1.0
  O  O26  1  0.092  0.898  0.030  1.0
  O  O27  1  0.898  0.092  0.530  1.0
  O  O28  1  0.377  0.645  0.169  1.0
  O  O29  1  0.666  0.534  0.893  1.0
  O  O30  1  0.299  0.794  0.698  1.0
  O  O31  1  0.464  0.182  0.872  1.0
  O  O32  1  0.977  0.986  0.813  1.0
  O  O33  1  0.654  0.383  0.401  1.0
  O  O34  1  0.692  0.550  0.175  1.0
  O  O35  1  0.782  0.913  0.035  1.0
[/CIF]
.
The compound described by SnPO4 crystallizes in the monoclinic Cc space group. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(4), and one O(7) atom. In the second Sn site, Sn(2) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(5) atom. In the third Sn site, Sn(3) is bonded to one O(10), one O(11), one O(6), one O(8), and one O(9) atom to form SnO5 trigonal bipyramids that share  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(10), one O(2), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Sn(3)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(1), one O(11), one O(12), and one O(3) atom to form PO4 tetrahedra that share  a cornercorner with one Sn(3)O5 trigonal bipyramid. In the third P site, P(3) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Sn(3)O5 trigonal bipyramids. There are twelve inequivalent O sites. In the first O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Sn(3) and one P(3) atom. In the second O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Sn(3) and one P(1) atom. In the third O site, O(10) is bonded in a bent 150 degrees geometry to one Sn(3) and one P(1) atom. In the fourth O site, O(11) is bonded in a bent 120 degrees geometry to one Sn(3) and one P(2) atom. In the fifth O site, O(12) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(2) atom. In the sixth O site, O(1) is bonded in a single-bond geometry to one P(2) atom. In the seventh O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sn(2) and one P(1) atom. In the eighth O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sn(2) and one P(2) atom. In the ninth O site, O(4) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(3) atom. In the tenth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Sn(2) and one P(3) atom. In the eleventh O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Sn(3) and one P(3) atom. In the twelfth O site, O(7) 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_SnPO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.132
_cell_length_b   8.132
_cell_length_c   9.709
_cell_angle_alpha   89.739
_cell_angle_beta   89.739
_cell_angle_gamma   117.575
_symmetry_Int_Tables_number   1
_cell_volume   569.022
_cell_formula_units_Z   6
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  0.993  0.379  0.548  1.0
  Sn  Sn1  1  0.417  0.010  0.540  1.0
  Sn  Sn2  1  0.656  0.580  0.537  1.0
  Sn  Sn3  1  0.379  0.993  0.048  1.0
  Sn  Sn4  1  0.010  0.417  0.040  1.0
  Sn  Sn5  1  0.580  0.656  0.037  1.0
  P  P6  1  0.352  0.647  0.331  1.0
  P  P7  1  0.986  0.001  0.967  1.0
  P  P8  1  0.359  0.646  0.740  1.0
  P  P9  1  0.646  0.359  0.240  1.0
  P  P10  1  0.647  0.352  0.831  1.0
  P  P11  1  0.001  0.986  0.467  1.0
  O  O12  1  0.986  0.977  0.313  1.0
  O  O13  1  0.324  0.817  0.366  1.0
  O  O14  1  0.203  0.082  0.525  1.0
  O  O15  1  0.449  0.210  0.200  1.0
  O  O16  1  0.794  0.299  0.198  1.0
  O  O17  1  0.550  0.692  0.675  1.0
  O  O18  1  0.182  0.464  0.372  1.0
  O  O19  1  0.082  0.203  0.025  1.0
  O  O20  1  0.383  0.654  0.901  1.0
  O  O21  1  0.817  0.324  0.866  1.0
  O  O22  1  0.645  0.377  0.669  1.0
  O  O23  1  0.210  0.449  0.700  1.0
  O  O24  1  0.534  0.666  0.393  1.0
  O  O25  1  0.913  0.782  0.535  1.0
  O  O26  1  0.092  0.898  0.030  1.0
  O  O27  1  0.898  0.092  0.530  1.0
  O  O28  1  0.377  0.645  0.169  1.0
  O  O29  1  0.666  0.534  0.893  1.0
  O  O30  1  0.299  0.794  0.698  1.0
  O  O31  1  0.464  0.182  0.872  1.0
  O  O32  1  0.977  0.986  0.813  1.0
  O  O33  1  0.654  0.383  0.401  1.0
  O  O34  1  0.692  0.550  0.175  1.0
  O  O35  1  0.782  0.913  0.035  1.0
[/CIF]
.