The crystal structure described by SrSn(PO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(8), two equivalent O(1), and two equivalent O(6) atoms. Sn(1) is bonded to one O(3), one O(4), one O(5), one O(7), and two equivalent O(8) atoms to form distorted SnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  an edgeedge with one Sn(1)O6 octahedra, and  an edgeedge with one 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(7) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-56°. In the second P site, P(2) 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(1)O6 octahedra and  an edgeedge with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-59°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Sr(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in an L-shaped geometry to one Sn(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(1), two equivalent Sn(1), and one P(2) atom. is represented by the CIF file [CIF]
data_SrSn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.693
_cell_length_b   7.049
_cell_length_c   9.287
_cell_angle_alpha   110.704
_cell_angle_beta   100.560
_cell_angle_gamma   98.082
_symmetry_Int_Tables_number   1
_cell_volume   334.076
_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
  Sr  Sr0  1  0.244  0.763  0.031  1.0
  Sr  Sr1  1  0.756  0.237  0.969  1.0
  Sn  Sn2  1  0.672  0.824  0.549  1.0
  Sn  Sn3  1  0.328  0.176  0.451  1.0
  P  P4  1  0.393  0.430  0.228  1.0
  P  P5  1  0.607  0.570  0.772  1.0
  P  P6  1  0.839  0.034  0.302  1.0
  P  P7  1  0.161  0.966  0.698  1.0
  O  O8  1  0.826  0.562  0.891  1.0
  O  O9  1  0.634  0.475  0.187  1.0
  O  O10  1  0.653  0.790  0.757  1.0
  O  O11  1  0.956  0.098  0.697  1.0
  O  O12  1  0.366  0.525  0.813  1.0
  O  O13  1  0.013  0.746  0.574  1.0
  O  O14  1  0.987  0.254  0.426  1.0
  O  O15  1  0.284  0.991  0.864  1.0
  O  O16  1  0.347  0.210  0.243  1.0
  O  O17  1  0.716  0.009  0.136  1.0
  O  O18  1  0.174  0.438  0.109  1.0
  O  O19  1  0.398  0.592  0.400  1.0
  O  O20  1  0.602  0.408  0.600  1.0
  O  O21  1  0.621  0.963  0.377  1.0
  O  O22  1  0.044  0.902  0.303  1.0
  O  O23  1  0.379  0.037  0.623  1.0
[/CIF]
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The crystal structure described by SrSn(PO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(4), one O(8), two equivalent O(1), and two equivalent O(6) atoms. Sn(1) is bonded to one O(3), one O(4), one O(5), one O(7), and two equivalent O(8) atoms to form distorted SnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  an edgeedge with one Sn(1)O6 octahedra, and  an edgeedge with one 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(7) atom to form PO4 tetrahedra that share corners with two equivalent Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 52-56°. In the second P site, P(2) 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(1)O6 octahedra and  an edgeedge with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-59°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Sr(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in an L-shaped geometry to one Sn(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent Sr(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Sr(1), two equivalent Sn(1), and one P(2) atom. is represented by the CIF file [CIF]
data_SrSn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.693
_cell_length_b   7.049
_cell_length_c   9.287
_cell_angle_alpha   110.704
_cell_angle_beta   100.560
_cell_angle_gamma   98.082
_symmetry_Int_Tables_number   1
_cell_volume   334.076
_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
  Sr  Sr0  1  0.244  0.763  0.031  1.0
  Sr  Sr1  1  0.756  0.237  0.969  1.0
  Sn  Sn2  1  0.672  0.824  0.549  1.0
  Sn  Sn3  1  0.328  0.176  0.451  1.0
  P  P4  1  0.393  0.430  0.228  1.0
  P  P5  1  0.607  0.570  0.772  1.0
  P  P6  1  0.839  0.034  0.302  1.0
  P  P7  1  0.161  0.966  0.698  1.0
  O  O8  1  0.826  0.562  0.891  1.0
  O  O9  1  0.634  0.475  0.187  1.0
  O  O10  1  0.653  0.790  0.757  1.0
  O  O11  1  0.956  0.098  0.697  1.0
  O  O12  1  0.366  0.525  0.813  1.0
  O  O13  1  0.013  0.746  0.574  1.0
  O  O14  1  0.987  0.254  0.426  1.0
  O  O15  1  0.284  0.991  0.864  1.0
  O  O16  1  0.347  0.210  0.243  1.0
  O  O17  1  0.716  0.009  0.136  1.0
  O  O18  1  0.174  0.438  0.109  1.0
  O  O19  1  0.398  0.592  0.400  1.0
  O  O20  1  0.602  0.408  0.600  1.0
  O  O21  1  0.621  0.963  0.377  1.0
  O  O22  1  0.044  0.902  0.303  1.0
  O  O23  1  0.379  0.037  0.623  1.0
[/CIF]
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