The crystal structure described by FeSn(PO4)2 crystallizes in the monoclinic P2_1/m space group. Fe(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with four equivalent Sn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-50°. Sn(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form SnO6 octahedra that share corners with four equivalent Fe(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-50°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with three equivalent Sn(1)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. In the second P site, P(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra, and  an edgeedge with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-55°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Fe(1) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Fe(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Fe(1) and one P(2) atom. is represented by the CIF file [CIF]
data_FeSn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.144
_cell_length_b   6.084
_cell_length_c   4.988
_cell_angle_alpha   90.000
_cell_angle_beta   90.131
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   307.778
_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
  Fe  Fe0  1  0.276  0.250  0.947  1.0
  Fe  Fe1  1  0.724  0.750  0.053  1.0
  Sn  Sn2  1  0.221  0.750  0.468  1.0
  Sn  Sn3  1  0.779  0.250  0.532  1.0
  P  P4  1  0.095  0.250  0.420  1.0
  P  P5  1  0.403  0.750  0.907  1.0
  P  P6  1  0.597  0.250  0.093  1.0
  P  P7  1  0.905  0.750  0.580  1.0
  O  O8  1  0.051  0.750  0.679  1.0
  O  O9  1  0.105  0.250  0.721  1.0
  O  O10  1  0.168  0.049  0.281  1.0
  O  O11  1  0.168  0.451  0.281  1.0
  O  O12  1  0.326  0.945  0.763  1.0
  O  O13  1  0.326  0.555  0.763  1.0
  O  O14  1  0.378  0.750  0.214  1.0
  O  O15  1  0.452  0.250  0.149  1.0
  O  O16  1  0.548  0.750  0.851  1.0
  O  O17  1  0.622  0.250  0.786  1.0
  O  O18  1  0.674  0.055  0.237  1.0
  O  O19  1  0.674  0.445  0.237  1.0
  O  O20  1  0.832  0.549  0.719  1.0
  O  O21  1  0.832  0.951  0.719  1.0
  O  O22  1  0.895  0.750  0.279  1.0
  O  O23  1  0.949  0.250  0.321  1.0
[/CIF]
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The crystal structure described by FeSn(PO4)2 crystallizes in the monoclinic P2_1/m space group. Fe(1) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with four equivalent Sn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-50°. Sn(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form SnO6 octahedra that share corners with four equivalent Fe(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-50°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with three equivalent Sn(1)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. In the second P site, P(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share  a cornercorner with one Sn(1)O6 octahedra, corners with three equivalent Fe(1)O6 octahedra, and  an edgeedge with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-55°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Sn(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Fe(1) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Fe(1), one Sn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Sn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Sn(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Fe(1) and one P(2) atom. is represented by the CIF file [CIF]
data_FeSn(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.144
_cell_length_b   6.084
_cell_length_c   4.988
_cell_angle_alpha   90.000
_cell_angle_beta   90.131
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   307.778
_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
  Fe  Fe0  1  0.276  0.250  0.947  1.0
  Fe  Fe1  1  0.724  0.750  0.053  1.0
  Sn  Sn2  1  0.221  0.750  0.468  1.0
  Sn  Sn3  1  0.779  0.250  0.532  1.0
  P  P4  1  0.095  0.250  0.420  1.0
  P  P5  1  0.403  0.750  0.907  1.0
  P  P6  1  0.597  0.250  0.093  1.0
  P  P7  1  0.905  0.750  0.580  1.0
  O  O8  1  0.051  0.750  0.679  1.0
  O  O9  1  0.105  0.250  0.721  1.0
  O  O10  1  0.168  0.049  0.281  1.0
  O  O11  1  0.168  0.451  0.281  1.0
  O  O12  1  0.326  0.945  0.763  1.0
  O  O13  1  0.326  0.555  0.763  1.0
  O  O14  1  0.378  0.750  0.214  1.0
  O  O15  1  0.452  0.250  0.149  1.0
  O  O16  1  0.548  0.750  0.851  1.0
  O  O17  1  0.622  0.250  0.786  1.0
  O  O18  1  0.674  0.055  0.237  1.0
  O  O19  1  0.674  0.445  0.237  1.0
  O  O20  1  0.832  0.549  0.719  1.0
  O  O21  1  0.832  0.951  0.719  1.0
  O  O22  1  0.895  0.750  0.279  1.0
  O  O23  1  0.949  0.250  0.321  1.0
[/CIF]
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