The structure described by CaSn(PO3)4 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form CaO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent Sn(1)O6 octahedra. Sn(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Ca(1)O6 octahedra. 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  a cornercorner with one Ca(1)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-60°. In the second P site, P(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra, corners with two equivalent Ca(1)O6 octahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-61°. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to one Ca(1), one Sn(1), and one P(1) atom. In the third O site, O(5) is bonded in a 3-coordinate geometry to one Ca(1), one Sn(1), and one P(2) atom. In the fourth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ca(1) and one P(2) atom. In the fifth O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one P(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaSn(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.901
_cell_length_b   7.901
_cell_length_c   11.138
_cell_angle_alpha   65.131
_cell_angle_beta   65.131
_cell_angle_gamma   69.560
_symmetry_Int_Tables_number   1
_cell_volume   559.704
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.976  0.024  0.750  1.0
  Ca  Ca1  1  0.024  0.976  0.250  1.0
  Sn  Sn2  1  0.000  0.500  0.500  1.0
  Sn  Sn3  1  0.500  0.000  0.000  1.0
  P  P4  1  0.693  0.681  0.813  1.0
  P  P5  1  0.319  0.307  0.687  1.0
  P  P6  1  0.307  0.319  0.187  1.0
  P  P7  1  0.681  0.693  0.313  1.0
  P  P8  1  0.740  0.286  0.014  1.0
  P  P9  1  0.714  0.260  0.486  1.0
  P  P10  1  0.260  0.714  0.986  1.0
  P  P11  1  0.286  0.740  0.514  1.0
  O  O12  1  0.467  0.690  0.867  1.0
  O  O13  1  0.310  0.533  0.633  1.0
  O  O14  1  0.533  0.310  0.133  1.0
  O  O15  1  0.690  0.467  0.367  1.0
  O  O16  1  0.765  0.503  0.935  1.0
  O  O17  1  0.497  0.235  0.565  1.0
  O  O18  1  0.235  0.497  0.065  1.0
  O  O19  1  0.503  0.765  0.435  1.0
  O  O20  1  0.777  0.645  0.677  1.0
  O  O21  1  0.355  0.223  0.823  1.0
  O  O22  1  0.223  0.355  0.323  1.0
  O  O23  1  0.645  0.777  0.177  1.0
  O  O24  1  0.727  0.854  0.820  1.0
  O  O25  1  0.146  0.273  0.680  1.0
  O  O26  1  0.273  0.146  0.180  1.0
  O  O27  1  0.854  0.727  0.320  1.0
  O  O28  1  0.733  0.205  0.915  1.0
  O  O29  1  0.795  0.267  0.585  1.0
  O  O30  1  0.267  0.795  0.085  1.0
  O  O31  1  0.205  0.733  0.415  1.0
  O  O32  1  0.884  0.184  0.087  1.0
  O  O33  1  0.816  0.116  0.413  1.0
  O  O34  1  0.116  0.816  0.913  1.0
  O  O35  1  0.184  0.884  0.587  1.0
[/CIF]
.
The structure described by CaSn(PO3)4 crystallizes in the monoclinic C2/c space group. Ca(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form CaO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with four equivalent P(2)O4 tetrahedra, and edges with two equivalent Sn(1)O6 octahedra. Sn(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form SnO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and edges with two equivalent Ca(1)O6 octahedra. 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  a cornercorner with one Ca(1)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 22-60°. In the second P site, P(2) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra, corners with two equivalent Ca(1)O6 octahedra, and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 20-61°. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(1) atom. In the second O site, O(4) is bonded in a 3-coordinate geometry to one Ca(1), one Sn(1), and one P(1) atom. In the third O site, O(5) is bonded in a 3-coordinate geometry to one Ca(1), one Sn(1), and one P(2) atom. In the fourth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Ca(1) and one P(2) atom. In the fifth O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the sixth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one P(1) and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_CaSn(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.901
_cell_length_b   7.901
_cell_length_c   11.138
_cell_angle_alpha   65.131
_cell_angle_beta   65.131
_cell_angle_gamma   69.560
_symmetry_Int_Tables_number   1
_cell_volume   559.704
_cell_formula_units_Z   2
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
  Ca  Ca0  1  0.976  0.024  0.750  1.0
  Ca  Ca1  1  0.024  0.976  0.250  1.0
  Sn  Sn2  1  0.000  0.500  0.500  1.0
  Sn  Sn3  1  0.500  0.000  0.000  1.0
  P  P4  1  0.693  0.681  0.813  1.0
  P  P5  1  0.319  0.307  0.687  1.0
  P  P6  1  0.307  0.319  0.187  1.0
  P  P7  1  0.681  0.693  0.313  1.0
  P  P8  1  0.740  0.286  0.014  1.0
  P  P9  1  0.714  0.260  0.486  1.0
  P  P10  1  0.260  0.714  0.986  1.0
  P  P11  1  0.286  0.740  0.514  1.0
  O  O12  1  0.467  0.690  0.867  1.0
  O  O13  1  0.310  0.533  0.633  1.0
  O  O14  1  0.533  0.310  0.133  1.0
  O  O15  1  0.690  0.467  0.367  1.0
  O  O16  1  0.765  0.503  0.935  1.0
  O  O17  1  0.497  0.235  0.565  1.0
  O  O18  1  0.235  0.497  0.065  1.0
  O  O19  1  0.503  0.765  0.435  1.0
  O  O20  1  0.777  0.645  0.677  1.0
  O  O21  1  0.355  0.223  0.823  1.0
  O  O22  1  0.223  0.355  0.323  1.0
  O  O23  1  0.645  0.777  0.177  1.0
  O  O24  1  0.727  0.854  0.820  1.0
  O  O25  1  0.146  0.273  0.680  1.0
  O  O26  1  0.273  0.146  0.180  1.0
  O  O27  1  0.854  0.727  0.320  1.0
  O  O28  1  0.733  0.205  0.915  1.0
  O  O29  1  0.795  0.267  0.585  1.0
  O  O30  1  0.267  0.795  0.085  1.0
  O  O31  1  0.205  0.733  0.415  1.0
  O  O32  1  0.884  0.184  0.087  1.0
  O  O33  1  0.816  0.116  0.413  1.0
  O  O34  1  0.116  0.816  0.913  1.0
  O  O35  1  0.184  0.884  0.587  1.0
[/CIF]
.