The crystal structure described by SrFe3(PO4)3O crystallizes in the monoclinic P2_1/m space group. Sr(1) is bonded in a 7-coordinate geometry to one O(10), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(7), one O(8), and two equivalent O(3) atoms to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the second Fe site, Fe(2) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the third Fe site, Fe(3) is bonded to one O(10), one O(6), one O(8), one O(9), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(7), one O(9), and two equivalent O(3) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(3)O6 octahedra and corners with three equivalent Fe(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 39°. In the second P site, P(2) is bonded to one O(10), one O(8), and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and  an edgeedge with one Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 47°. In the third P site, P(3) is bonded to one O(1), one O(2), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, and  a cornercorner with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 40-56°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Fe(2) and one P(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), one Fe(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 Fe(3), and one P(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Sr(1), one Fe(2), and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Fe(3) and two equivalent Fe(2) atoms. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Fe(1), one Fe(3), and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Fe(3) and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Sr(1), one Fe(3), and one P(2) atom. is represented by the CIF card [CIF]
data_SrFe3P3O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.434
_cell_length_b   7.702
_cell_length_c   10.476
_cell_angle_alpha   80.443
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   511.963
_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  0.250  0.336  0.701  1.0
  Sr  Sr1  1  0.750  0.664  0.299  1.0
  Fe  Fe2  1  0.250  0.789  0.058  1.0
  Fe  Fe3  1  0.000  0.000  0.500  1.0
  Fe  Fe4  1  0.750  0.211  0.942  1.0
  Fe  Fe5  1  0.250  0.351  0.302  1.0
  Fe  Fe6  1  0.750  0.649  0.698  1.0
  Fe  Fe7  1  0.500  0.000  0.500  1.0
  P  P8  1  0.250  0.216  0.019  1.0
  P  P9  1  0.750  0.784  0.981  1.0
  P  P10  1  0.750  0.312  0.616  1.0
  P  P11  1  0.750  0.253  0.263  1.0
  P  P12  1  0.250  0.747  0.737  1.0
  P  P13  1  0.250  0.688  0.384  1.0
  O  O14  1  0.250  0.800  0.871  1.0
  O  O15  1  0.750  0.079  0.367  1.0
  O  O16  1  0.059  0.250  0.926  1.0
  O  O17  1  0.938  0.367  0.288  1.0
  O  O18  1  0.559  0.750  0.074  1.0
  O  O19  1  0.448  0.791  0.408  1.0
  O  O20  1  0.562  0.367  0.288  1.0
  O  O21  1  0.250  0.122  0.410  1.0
  O  O22  1  0.941  0.750  0.074  1.0
  O  O23  1  0.250  0.024  0.092  1.0
  O  O24  1  0.948  0.209  0.592  1.0
  O  O25  1  0.062  0.633  0.712  1.0
  O  O26  1  0.052  0.791  0.408  1.0
  O  O27  1  0.750  0.349  0.760  1.0
  O  O28  1  0.250  0.345  0.115  1.0
  O  O29  1  0.552  0.209  0.592  1.0
  O  O30  1  0.438  0.633  0.712  1.0
  O  O31  1  0.750  0.504  0.542  1.0
  O  O32  1  0.750  0.200  0.129  1.0
  O  O33  1  0.250  0.921  0.633  1.0
  O  O34  1  0.250  0.496  0.458  1.0
  O  O35  1  0.750  0.878  0.590  1.0
  O  O36  1  0.441  0.250  0.926  1.0
  O  O37  1  0.750  0.976  0.908  1.0
  O  O38  1  0.750  0.655  0.885  1.0
  O  O39  1  0.250  0.651  0.240  1.0
[/CIF]
.
The crystal structure described by SrFe3(PO4)3O crystallizes in the monoclinic P2_1/m space group. Sr(1) is bonded in a 7-coordinate geometry to one O(10), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(7), one O(8), and two equivalent O(3) atoms to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the second Fe site, Fe(2) is bonded to two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms to form FeO6 octahedra that share corners with two equivalent Fe(3)O6 octahedra, corners with two equivalent P(2)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra, and edges with two equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles are 54°. In the third Fe site, Fe(3) is bonded to one O(10), one O(6), one O(8), one O(9), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(3)O4 tetrahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(7), one O(9), and two equivalent O(3) atoms to form PO4 tetrahedra that share  a cornercorner with one Fe(3)O6 octahedra and corners with three equivalent Fe(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 39°. In the second P site, P(2) is bonded to one O(10), one O(8), and two equivalent O(5) atoms to form PO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and  an edgeedge with one Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 47°. In the third P site, P(3) is bonded to one O(1), one O(2), and two equivalent O(4) atoms to form PO4 tetrahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with two equivalent Fe(3)O6 octahedra, and  a cornercorner with one Fe(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 40-56°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Fe(2) and one P(3) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), one Fe(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 Fe(3), and one P(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Sr(1), one Fe(2), and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Fe(3) and two equivalent Fe(2) atoms. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one Fe(1) and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Fe(1), one Fe(3), and one P(2) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Fe(3) and one P(1) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Sr(1), one Fe(3), and one P(2) atom. is represented by the CIF card [CIF]
data_SrFe3P3O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.434
_cell_length_b   7.702
_cell_length_c   10.476
_cell_angle_alpha   80.443
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   511.963
_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  0.250  0.336  0.701  1.0
  Sr  Sr1  1  0.750  0.664  0.299  1.0
  Fe  Fe2  1  0.250  0.789  0.058  1.0
  Fe  Fe3  1  0.000  0.000  0.500  1.0
  Fe  Fe4  1  0.750  0.211  0.942  1.0
  Fe  Fe5  1  0.250  0.351  0.302  1.0
  Fe  Fe6  1  0.750  0.649  0.698  1.0
  Fe  Fe7  1  0.500  0.000  0.500  1.0
  P  P8  1  0.250  0.216  0.019  1.0
  P  P9  1  0.750  0.784  0.981  1.0
  P  P10  1  0.750  0.312  0.616  1.0
  P  P11  1  0.750  0.253  0.263  1.0
  P  P12  1  0.250  0.747  0.737  1.0
  P  P13  1  0.250  0.688  0.384  1.0
  O  O14  1  0.250  0.800  0.871  1.0
  O  O15  1  0.750  0.079  0.367  1.0
  O  O16  1  0.059  0.250  0.926  1.0
  O  O17  1  0.938  0.367  0.288  1.0
  O  O18  1  0.559  0.750  0.074  1.0
  O  O19  1  0.448  0.791  0.408  1.0
  O  O20  1  0.562  0.367  0.288  1.0
  O  O21  1  0.250  0.122  0.410  1.0
  O  O22  1  0.941  0.750  0.074  1.0
  O  O23  1  0.250  0.024  0.092  1.0
  O  O24  1  0.948  0.209  0.592  1.0
  O  O25  1  0.062  0.633  0.712  1.0
  O  O26  1  0.052  0.791  0.408  1.0
  O  O27  1  0.750  0.349  0.760  1.0
  O  O28  1  0.250  0.345  0.115  1.0
  O  O29  1  0.552  0.209  0.592  1.0
  O  O30  1  0.438  0.633  0.712  1.0
  O  O31  1  0.750  0.504  0.542  1.0
  O  O32  1  0.750  0.200  0.129  1.0
  O  O33  1  0.250  0.921  0.633  1.0
  O  O34  1  0.250  0.496  0.458  1.0
  O  O35  1  0.750  0.878  0.590  1.0
  O  O36  1  0.441  0.250  0.926  1.0
  O  O37  1  0.750  0.976  0.908  1.0
  O  O38  1  0.750  0.655  0.885  1.0
  O  O39  1  0.250  0.651  0.240  1.0
[/CIF]
.