The material described by Fe(PO3)4 crystallizes in the monoclinic C2/c space group. Fe(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with four equivalent 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(3), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. In the second P site, P(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Fe(1)O6 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 25-45°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. is represented by the CIF file [CIF]
data_Fe(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.475
_cell_length_b   7.475
_cell_length_c   9.773
_cell_angle_alpha   69.072
_cell_angle_beta   69.072
_cell_angle_gamma   69.520
_symmetry_Int_Tables_number   1
_cell_volume   460.659
_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  0.500  0.000  0.000  1.0
  Fe  Fe1  1  0.000  0.500  0.500  1.0
  P  P2  1  0.728  0.275  0.463  1.0
  P  P3  1  0.725  0.272  0.037  1.0
  P  P4  1  0.698  0.664  0.812  1.0
  P  P5  1  0.275  0.728  0.963  1.0
  P  P6  1  0.272  0.725  0.537  1.0
  P  P7  1  0.336  0.302  0.688  1.0
  P  P8  1  0.664  0.698  0.312  1.0
  P  P9  1  0.302  0.336  0.188  1.0
  O  O10  1  0.876  0.140  0.124  1.0
  O  O11  1  0.192  0.357  0.344  1.0
  O  O12  1  0.808  0.643  0.656  1.0
  O  O13  1  0.819  0.319  0.559  1.0
  O  O14  1  0.319  0.819  0.059  1.0
  O  O15  1  0.478  0.641  0.847  1.0
  O  O16  1  0.314  0.151  0.153  1.0
  O  O17  1  0.208  0.527  0.066  1.0
  O  O18  1  0.527  0.208  0.566  1.0
  O  O19  1  0.359  0.522  0.653  1.0
  O  O20  1  0.124  0.860  0.876  1.0
  O  O21  1  0.357  0.192  0.844  1.0
  O  O22  1  0.849  0.686  0.347  1.0
  O  O23  1  0.140  0.876  0.624  1.0
  O  O24  1  0.860  0.124  0.376  1.0
  O  O25  1  0.681  0.181  0.941  1.0
  O  O26  1  0.643  0.808  0.156  1.0
  O  O27  1  0.181  0.681  0.441  1.0
  O  O28  1  0.641  0.478  0.347  1.0
  O  O29  1  0.473  0.792  0.434  1.0
  O  O30  1  0.792  0.473  0.934  1.0
  O  O31  1  0.686  0.849  0.847  1.0
  O  O32  1  0.522  0.359  0.153  1.0
  O  O33  1  0.151  0.314  0.653  1.0
[/CIF]
.
The material described by Fe(PO3)4 crystallizes in the monoclinic C2/c space group. Fe(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with four equivalent 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(3), one O(4), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(1)O6 octahedra and corners with two equivalent P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. In the second P site, P(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Fe(1)O6 octahedra and corners with two equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 25-45°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Fe(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. is represented by the CIF file [CIF]
data_Fe(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.475
_cell_length_b   7.475
_cell_length_c   9.773
_cell_angle_alpha   69.072
_cell_angle_beta   69.072
_cell_angle_gamma   69.520
_symmetry_Int_Tables_number   1
_cell_volume   460.659
_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  0.500  0.000  0.000  1.0
  Fe  Fe1  1  0.000  0.500  0.500  1.0
  P  P2  1  0.728  0.275  0.463  1.0
  P  P3  1  0.725  0.272  0.037  1.0
  P  P4  1  0.698  0.664  0.812  1.0
  P  P5  1  0.275  0.728  0.963  1.0
  P  P6  1  0.272  0.725  0.537  1.0
  P  P7  1  0.336  0.302  0.688  1.0
  P  P8  1  0.664  0.698  0.312  1.0
  P  P9  1  0.302  0.336  0.188  1.0
  O  O10  1  0.876  0.140  0.124  1.0
  O  O11  1  0.192  0.357  0.344  1.0
  O  O12  1  0.808  0.643  0.656  1.0
  O  O13  1  0.819  0.319  0.559  1.0
  O  O14  1  0.319  0.819  0.059  1.0
  O  O15  1  0.478  0.641  0.847  1.0
  O  O16  1  0.314  0.151  0.153  1.0
  O  O17  1  0.208  0.527  0.066  1.0
  O  O18  1  0.527  0.208  0.566  1.0
  O  O19  1  0.359  0.522  0.653  1.0
  O  O20  1  0.124  0.860  0.876  1.0
  O  O21  1  0.357  0.192  0.844  1.0
  O  O22  1  0.849  0.686  0.347  1.0
  O  O23  1  0.140  0.876  0.624  1.0
  O  O24  1  0.860  0.124  0.376  1.0
  O  O25  1  0.681  0.181  0.941  1.0
  O  O26  1  0.643  0.808  0.156  1.0
  O  O27  1  0.181  0.681  0.441  1.0
  O  O28  1  0.641  0.478  0.347  1.0
  O  O29  1  0.473  0.792  0.434  1.0
  O  O30  1  0.792  0.473  0.934  1.0
  O  O31  1  0.686  0.849  0.847  1.0
  O  O32  1  0.522  0.359  0.153  1.0
  O  O33  1  0.151  0.314  0.653  1.0
[/CIF]
.