The compound described by Fe2P3O13 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(1), one O(11), one O(5), one O(6), and one O(7) atom. In the second Fe site, Fe(2) is bonded to one O(12), one O(2), one O(3), one O(8), and one O(9) atom to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)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(5), one O(7), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O5 trigonal bipyramid. In the second P site, P(2) is bonded to one O(1), one O(13), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra and  a cornercorner with one Fe(2)O5 trigonal bipyramid. In the third P site, P(3) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent Fe(2)O5 trigonal bipyramids. There are thirteen inequivalent O sites. In the first O site, O(12) is bonded in a single-bond geometry to one Fe(2) atom. In the second O site, O(13) is bonded in a single-bond geometry to one P(2) atom. In the third O site, O(1) is bonded in a bent 120 degrees geometry to one Fe(1) and one P(2) atom. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to one Fe(2) and one P(3) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(2) and one P(2) atom. In the sixth O site, O(4) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the seventh O site, O(5) is bonded in a bent 120 degrees geometry to one Fe(1) and one P(1) atom. In the eighth O site, O(6) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(3) atom. In the ninth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and one P(1) atom. In the tenth O site, O(8) is bonded in a bent 120 degrees geometry to one Fe(2) and one P(3) atom. In the eleventh O site, O(9) is bonded in a linear geometry to one Fe(2) and one P(1) atom. In the twelfth O site, O(10) is bonded in a distorted water-like geometry to one P(1) and one O(11) atom. In the thirteenth O site, O(11) is bonded in a water-like geometry to one Fe(1) and one O(10) atom. is represented by the CIF card [CIF]
data_Fe2P3O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.296
_cell_length_b   8.365
_cell_length_c   11.214
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   109.809
_symmetry_Int_Tables_number   1
_cell_volume   643.861
_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  0.951  0.617  0.381  1.0
  Fe  Fe1  1  0.049  0.383  0.881  1.0
  Fe  Fe2  1  0.602  0.985  0.625  1.0
  Fe  Fe3  1  0.398  0.015  0.125  1.0
  P  P4  1  0.904  0.404  0.618  1.0
  P  P5  1  0.096  0.596  0.118  1.0
  P  P6  1  0.619  0.763  0.408  1.0
  P  P7  1  0.381  0.237  0.908  1.0
  P  P8  1  0.355  0.959  0.391  1.0
  P  P9  1  0.645  0.041  0.891  1.0
  O  O10  1  0.778  0.736  0.327  1.0
  O  O11  1  0.222  0.264  0.827  1.0
  O  O12  1  0.669  0.931  0.788  1.0
  O  O13  1  0.331  0.069  0.288  1.0
  O  O14  1  0.717  0.868  0.517  1.0
  O  O15  1  0.283  0.132  0.017  1.0
  O  O16  1  0.491  0.129  0.835  1.0
  O  O17  1  0.509  0.871  0.335  1.0
  O  O18  1  0.011  0.468  0.501  1.0
  O  O19  1  0.989  0.532  0.001  1.0
  O  O20  1  0.167  0.813  0.420  1.0
  O  O21  1  0.833  0.187  0.920  1.0
  O  O22  1  0.990  0.517  0.232  1.0
  O  O23  1  0.010  0.483  0.732  1.0
  O  O24  1  0.448  0.059  0.502  1.0
  O  O25  1  0.552  0.941  0.002  1.0
  O  O26  1  0.799  0.216  0.630  1.0
  O  O27  1  0.201  0.784  0.130  1.0
  O  O28  1  0.715  0.488  0.608  1.0
  O  O29  1  0.285  0.512  0.108  1.0
  O  O30  1  0.675  0.494  0.490  1.0
  O  O31  1  0.325  0.506  0.990  1.0
  O  O32  1  0.356  0.812  0.665  1.0
  O  O33  1  0.644  0.188  0.165  1.0
  O  O34  1  0.452  0.596  0.435  1.0
  O  O35  1  0.548  0.404  0.935  1.0
[/CIF]
.
The compound described by Fe2P3O13 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(1), one O(11), one O(5), one O(6), and one O(7) atom. In the second Fe site, Fe(2) is bonded to one O(12), one O(2), one O(3), one O(8), and one O(9) atom to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)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(5), one O(7), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Fe(2)O5 trigonal bipyramid. In the second P site, P(2) is bonded to one O(1), one O(13), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra and  a cornercorner with one Fe(2)O5 trigonal bipyramid. In the third P site, P(3) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent Fe(2)O5 trigonal bipyramids. There are thirteen inequivalent O sites. In the first O site, O(12) is bonded in a single-bond geometry to one Fe(2) atom. In the second O site, O(13) is bonded in a single-bond geometry to one P(2) atom. In the third O site, O(1) is bonded in a bent 120 degrees geometry to one Fe(1) and one P(2) atom. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to one Fe(2) and one P(3) atom. In the fifth O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(2) and one P(2) atom. In the sixth O site, O(4) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the seventh O site, O(5) is bonded in a bent 120 degrees geometry to one Fe(1) and one P(1) atom. In the eighth O site, O(6) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(3) atom. In the ninth O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Fe(1) and one P(1) atom. In the tenth O site, O(8) is bonded in a bent 120 degrees geometry to one Fe(2) and one P(3) atom. In the eleventh O site, O(9) is bonded in a linear geometry to one Fe(2) and one P(1) atom. In the twelfth O site, O(10) is bonded in a distorted water-like geometry to one P(1) and one O(11) atom. In the thirteenth O site, O(11) is bonded in a water-like geometry to one Fe(1) and one O(10) atom. is represented by the CIF card [CIF]
data_Fe2P3O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.296
_cell_length_b   8.365
_cell_length_c   11.214
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   109.809
_symmetry_Int_Tables_number   1
_cell_volume   643.861
_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  0.951  0.617  0.381  1.0
  Fe  Fe1  1  0.049  0.383  0.881  1.0
  Fe  Fe2  1  0.602  0.985  0.625  1.0
  Fe  Fe3  1  0.398  0.015  0.125  1.0
  P  P4  1  0.904  0.404  0.618  1.0
  P  P5  1  0.096  0.596  0.118  1.0
  P  P6  1  0.619  0.763  0.408  1.0
  P  P7  1  0.381  0.237  0.908  1.0
  P  P8  1  0.355  0.959  0.391  1.0
  P  P9  1  0.645  0.041  0.891  1.0
  O  O10  1  0.778  0.736  0.327  1.0
  O  O11  1  0.222  0.264  0.827  1.0
  O  O12  1  0.669  0.931  0.788  1.0
  O  O13  1  0.331  0.069  0.288  1.0
  O  O14  1  0.717  0.868  0.517  1.0
  O  O15  1  0.283  0.132  0.017  1.0
  O  O16  1  0.491  0.129  0.835  1.0
  O  O17  1  0.509  0.871  0.335  1.0
  O  O18  1  0.011  0.468  0.501  1.0
  O  O19  1  0.989  0.532  0.001  1.0
  O  O20  1  0.167  0.813  0.420  1.0
  O  O21  1  0.833  0.187  0.920  1.0
  O  O22  1  0.990  0.517  0.232  1.0
  O  O23  1  0.010  0.483  0.732  1.0
  O  O24  1  0.448  0.059  0.502  1.0
  O  O25  1  0.552  0.941  0.002  1.0
  O  O26  1  0.799  0.216  0.630  1.0
  O  O27  1  0.201  0.784  0.130  1.0
  O  O28  1  0.715  0.488  0.608  1.0
  O  O29  1  0.285  0.512  0.108  1.0
  O  O30  1  0.675  0.494  0.490  1.0
  O  O31  1  0.325  0.506  0.990  1.0
  O  O32  1  0.356  0.812  0.665  1.0
  O  O33  1  0.644  0.188  0.165  1.0
  O  O34  1  0.452  0.596  0.435  1.0
  O  O35  1  0.548  0.404  0.935  1.0
[/CIF]
.