The crystal structure described by Sr4Fe6O13 crystallizes in the orthorhombic Iba2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(2), one O(5), two equivalent O(3), two equivalent O(4), and three equivalent O(1) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(6), two equivalent O(3), two equivalent O(4), and three equivalent O(2) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), two equivalent O(5), and two equivalent O(7) atoms to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Fe(1)O5 trigonal bipyramids, corners with two equivalent Fe(2)O5 trigonal bipyramids, and edges with three equivalent Fe(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 13°. In the second Fe site, Fe(2) is bonded to one O(2), one O(5), and three equivalent O(6) atoms to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Fe(1)O5 trigonal bipyramids, corners with four equivalent Fe(2)O5 trigonal bipyramids, and  an edgeedge with one Fe(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 6°. In the third Fe site, Fe(3) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with four equivalent Fe(3)O6 octahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and  a cornercorner with one Fe(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 3-14°. There are seven inequivalent O sites. In the first O site, O(7) is bonded to four equivalent Fe(1) atoms to form distorted OFe4 trigonal pyramids that share corners with four equivalent O(5)SrFe3 tetrahedra, edges with two equivalent O(5)SrFe3 tetrahedra, and edges with two equivalent O(7)Fe4 trigonal pyramids. In the second O site, O(1) is bonded in a 6-coordinate geometry to one Sr(2), three equivalent Sr(1), one Fe(1), and one Fe(3) atom. In the third O site, O(2) is bonded in a 6-coordinate geometry to one Sr(1), three equivalent Sr(2), one Fe(2), and one Fe(3) atom. In the fourth O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(3) atoms to form distorted OSr4Fe2 octahedra that share corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(5)SrFe3 tetrahedra, corners with two equivalent O(6)SrFe3 tetrahedra, edges with two equivalent O(4)Sr4Fe2 octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, and faces with two equivalent O(4)Sr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the fifth O site, O(4) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(3) atoms to form distorted OSr4Fe2 octahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(5)SrFe3 tetrahedra, corners with two equivalent O(6)SrFe3 tetrahedra, edges with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, and faces with two equivalent O(4)Sr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the sixth O site, O(5) is bonded to one Sr(1), one Fe(2), and two equivalent Fe(1) atoms to form distorted OSrFe3 tetrahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(5)SrFe3 tetrahedra, corners with three equivalent O(6)SrFe3 tetrahedra, corners with two equivalent O(7)Fe4 trigonal pyramids, and  an edgeedge with one O(7)Fe4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 25-71°. In the seventh O site, O(6) is bonded to one Sr(2) and three equivalent Fe(2) atoms to form distorted OSrFe3 tetrahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(4)Sr4Fe2 octahedra, corners with three equivalent O(5)SrFe3 tetrahedra, corners with four equivalent O(6)SrFe3 tetrahedra, and  an edgeedge with one O(6)SrFe3 tetrahedra. The corner-sharing octahedral tilt angles range from 26-66°. is represented by the CIF file [CIF]
data_Sr4Fe6O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.719
_cell_length_b   11.719
_cell_length_c   11.719
_cell_angle_alpha   153.055
_cell_angle_beta   123.223
_cell_angle_gamma   63.938
_symmetry_Int_Tables_number   1
_cell_volume   604.940
_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  0.216  0.853  0.381  1.0
  Sr  Sr1  1  0.784  0.164  0.637  1.0
  Sr  Sr2  1  0.472  0.353  0.137  1.0
  Sr  Sr3  1  0.528  0.664  0.881  1.0
  Sr  Sr4  1  0.036  0.665  0.374  1.0
  Sr  Sr5  1  0.964  0.339  0.629  1.0
  Sr  Sr6  1  0.291  0.165  0.129  1.0
  Sr  Sr7  1  0.709  0.839  0.874  1.0
  Fe  Fe8  1  0.663  0.610  0.205  1.0
  Fe  Fe9  1  0.337  0.542  0.947  1.0
  Fe  Fe10  1  0.405  0.110  0.447  1.0
  Fe  Fe11  1  0.595  0.042  0.705  1.0
  Fe  Fe12  1  0.056  0.964  0.116  1.0
  Fe  Fe13  1  0.944  0.060  0.908  1.0
  Fe  Fe14  1  0.848  0.464  0.408  1.0
  Fe  Fe15  1  0.152  0.560  0.616  1.0
  Fe  Fe16  1  0.875  0.755  0.126  1.0
  Fe  Fe17  1  0.125  0.251  0.880  1.0
  Fe  Fe18  1  0.629  0.255  0.380  1.0
  Fe  Fe19  1  0.371  0.751  0.626  1.0
  O  O20  1  0.759  0.629  0.136  1.0
  O  O21  1  0.241  0.377  0.870  1.0
  O  O22  1  0.493  0.129  0.370  1.0
  O  O23  1  0.507  0.877  0.636  1.0
  O  O24  1  0.970  0.843  0.102  1.0
  O  O25  1  0.030  0.132  0.873  1.0
  O  O26  1  0.741  0.343  0.373  1.0
  O  O27  1  0.259  0.632  0.602  1.0
  O  O28  1  0.743  0.998  0.260  1.0
  O  O29  1  0.257  0.517  0.255  1.0
  O  O30  1  0.738  0.498  0.755  1.0
  O  O31  1  0.262  0.017  0.760  1.0
  O  O32  1  0.003  0.004  0.503  1.0
  O  O33  1  0.997  0.499  0.001  1.0
  O  O34  1  0.501  0.504  0.501  1.0
  O  O35  1  0.499  0.999  0.003  1.0
  O  O36  1  0.759  0.945  0.631  1.0
  O  O37  1  0.241  0.872  0.186  1.0
  O  O38  1  0.314  0.445  0.686  1.0
  O  O39  1  0.686  0.372  0.131  1.0
  O  O40  1  0.970  0.423  0.300  1.0
  O  O41  1  0.030  0.330  0.453  1.0
  O  O42  1  0.123  0.923  0.953  1.0
  O  O43  1  0.877  0.830  0.800  1.0
  O  O44  1  0.500  0.801  0.301  1.0
  O  O45  1  0.500  0.301  0.801  1.0
[/CIF]
.
The crystal structure described by Sr4Fe6O13 crystallizes in the orthorhombic Iba2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(2), one O(5), two equivalent O(3), two equivalent O(4), and three equivalent O(1) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one O(1), one O(6), two equivalent O(3), two equivalent O(4), and three equivalent O(2) atoms. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), two equivalent O(5), and two equivalent O(7) atoms to form distorted FeO5 trigonal bipyramids that share  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Fe(1)O5 trigonal bipyramids, corners with two equivalent Fe(2)O5 trigonal bipyramids, and edges with three equivalent Fe(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 13°. In the second Fe site, Fe(2) is bonded to one O(2), one O(5), and three equivalent O(6) atoms to form FeO5 trigonal bipyramids that share  a cornercorner with one Fe(3)O6 octahedra, corners with two equivalent Fe(1)O5 trigonal bipyramids, corners with four equivalent Fe(2)O5 trigonal bipyramids, and  an edgeedge with one Fe(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 6°. In the third Fe site, Fe(3) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with four equivalent Fe(3)O6 octahedra,  a cornercorner with one Fe(1)O5 trigonal bipyramid, and  a cornercorner with one Fe(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 3-14°. There are seven inequivalent O sites. In the first O site, O(7) is bonded to four equivalent Fe(1) atoms to form distorted OFe4 trigonal pyramids that share corners with four equivalent O(5)SrFe3 tetrahedra, edges with two equivalent O(5)SrFe3 tetrahedra, and edges with two equivalent O(7)Fe4 trigonal pyramids. In the second O site, O(1) is bonded in a 6-coordinate geometry to one Sr(2), three equivalent Sr(1), one Fe(1), and one Fe(3) atom. In the third O site, O(2) is bonded in a 6-coordinate geometry to one Sr(1), three equivalent Sr(2), one Fe(2), and one Fe(3) atom. In the fourth O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(3) atoms to form distorted OSr4Fe2 octahedra that share corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(5)SrFe3 tetrahedra, corners with two equivalent O(6)SrFe3 tetrahedra, edges with two equivalent O(4)Sr4Fe2 octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, and faces with two equivalent O(4)Sr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the fifth O site, O(4) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(3) atoms to form distorted OSr4Fe2 octahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(5)SrFe3 tetrahedra, corners with two equivalent O(6)SrFe3 tetrahedra, edges with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, and faces with two equivalent O(4)Sr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 6-9°. In the sixth O site, O(5) is bonded to one Sr(1), one Fe(2), and two equivalent Fe(1) atoms to form distorted OSrFe3 tetrahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(5)SrFe3 tetrahedra, corners with three equivalent O(6)SrFe3 tetrahedra, corners with two equivalent O(7)Fe4 trigonal pyramids, and  an edgeedge with one O(7)Fe4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 25-71°. In the seventh O site, O(6) is bonded to one Sr(2) and three equivalent Fe(2) atoms to form distorted OSrFe3 tetrahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(4)Sr4Fe2 octahedra, corners with three equivalent O(5)SrFe3 tetrahedra, corners with four equivalent O(6)SrFe3 tetrahedra, and  an edgeedge with one O(6)SrFe3 tetrahedra. The corner-sharing octahedral tilt angles range from 26-66°. is represented by the CIF file [CIF]
data_Sr4Fe6O13
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.719
_cell_length_b   11.719
_cell_length_c   11.719
_cell_angle_alpha   153.055
_cell_angle_beta   123.223
_cell_angle_gamma   63.938
_symmetry_Int_Tables_number   1
_cell_volume   604.940
_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  0.216  0.853  0.381  1.0
  Sr  Sr1  1  0.784  0.164  0.637  1.0
  Sr  Sr2  1  0.472  0.353  0.137  1.0
  Sr  Sr3  1  0.528  0.664  0.881  1.0
  Sr  Sr4  1  0.036  0.665  0.374  1.0
  Sr  Sr5  1  0.964  0.339  0.629  1.0
  Sr  Sr6  1  0.291  0.165  0.129  1.0
  Sr  Sr7  1  0.709  0.839  0.874  1.0
  Fe  Fe8  1  0.663  0.610  0.205  1.0
  Fe  Fe9  1  0.337  0.542  0.947  1.0
  Fe  Fe10  1  0.405  0.110  0.447  1.0
  Fe  Fe11  1  0.595  0.042  0.705  1.0
  Fe  Fe12  1  0.056  0.964  0.116  1.0
  Fe  Fe13  1  0.944  0.060  0.908  1.0
  Fe  Fe14  1  0.848  0.464  0.408  1.0
  Fe  Fe15  1  0.152  0.560  0.616  1.0
  Fe  Fe16  1  0.875  0.755  0.126  1.0
  Fe  Fe17  1  0.125  0.251  0.880  1.0
  Fe  Fe18  1  0.629  0.255  0.380  1.0
  Fe  Fe19  1  0.371  0.751  0.626  1.0
  O  O20  1  0.759  0.629  0.136  1.0
  O  O21  1  0.241  0.377  0.870  1.0
  O  O22  1  0.493  0.129  0.370  1.0
  O  O23  1  0.507  0.877  0.636  1.0
  O  O24  1  0.970  0.843  0.102  1.0
  O  O25  1  0.030  0.132  0.873  1.0
  O  O26  1  0.741  0.343  0.373  1.0
  O  O27  1  0.259  0.632  0.602  1.0
  O  O28  1  0.743  0.998  0.260  1.0
  O  O29  1  0.257  0.517  0.255  1.0
  O  O30  1  0.738  0.498  0.755  1.0
  O  O31  1  0.262  0.017  0.760  1.0
  O  O32  1  0.003  0.004  0.503  1.0
  O  O33  1  0.997  0.499  0.001  1.0
  O  O34  1  0.501  0.504  0.501  1.0
  O  O35  1  0.499  0.999  0.003  1.0
  O  O36  1  0.759  0.945  0.631  1.0
  O  O37  1  0.241  0.872  0.186  1.0
  O  O38  1  0.314  0.445  0.686  1.0
  O  O39  1  0.686  0.372  0.131  1.0
  O  O40  1  0.970  0.423  0.300  1.0
  O  O41  1  0.030  0.330  0.453  1.0
  O  O42  1  0.123  0.923  0.953  1.0
  O  O43  1  0.877  0.830  0.800  1.0
  O  O44  1  0.500  0.801  0.301  1.0
  O  O45  1  0.500  0.301  0.801  1.0
[/CIF]
.