Fe5O7F3 is Hydrophilite-derived structured and crystallizes in the monoclinic P2_1 space group. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(4), one O(5), one O(6), one F(1), and one F(2) atom to form FeO4F2 octahedra that share corners with four equivalent Fe(2)O4F2 octahedra, corners with four equivalent Fe(3)O5F octahedra,  an edgeedge with one Fe(2)O4F2 octahedra, and  an edgeedge with one Fe(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. In the second Fe site, Fe(2) is bonded to one O(1), one O(5), two equivalent O(6), and two equivalent F(1) atoms to form FeO4F2 octahedra that share corners with four equivalent Fe(1)O4F2 octahedra, corners with four equivalent Fe(2)O4F2 octahedra,  an edgeedge with one Fe(1)O4F2 octahedra, and  an edgeedge with one Fe(3)O5F octahedra. The corner-sharing octahedral tilt angles range from 44-55°. In the third Fe site, Fe(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one F(2) atom to form a mixture of corner and edge-sharing FeO5F octahedra. The corner-sharing octahedral tilt angles range from 46-56°. In the fourth Fe site, Fe(4) is bonded to one O(2), one O(7), two equivalent O(3), and two equivalent F(3) atoms to form FeO4F2 octahedra that share corners with four equivalent Fe(4)O4F2 octahedra, corners with four equivalent Fe(5)O4F2 octahedra,  an edgeedge with one Fe(5)O4F2 octahedra, and  an edgeedge with one Fe(3)O5F octahedra. The corner-sharing octahedral tilt angles range from 46-59°. In the fifth Fe site, Fe(5) is bonded to one O(2), one O(3), one O(4), one O(7), one F(2), and one F(3) atom to form FeO4F2 octahedra that share corners with four equivalent Fe(4)O4F2 octahedra, corners with four equivalent Fe(3)O5F octahedra,  an edgeedge with one Fe(1)O4F2 octahedra, and  an edgeedge with one Fe(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 46-59°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(3), one Fe(4), and one Fe(5) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Fe(5) and two equivalent Fe(4) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(3) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Fe(2) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Fe(3), one Fe(4), and one Fe(5) atom. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted trigonal planar geometry to one Fe(1) and two equivalent Fe(2) atoms. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Fe(5) and two equivalent Fe(4) atoms.
Fe5O7F3 is Hydrophilite-derived structured and crystallizes in the monoclinic P2_1 space group. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(4), one O(5), one O(6), one F(1), and one F(2) atom to form FeO4F2 octahedra that share corners with four equivalent Fe(2)O4F2 octahedra, corners with four equivalent Fe(3)O5F octahedra,  an edgeedge with one Fe(2)O4F2 octahedra, and  an edgeedge with one Fe(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 47-55°. The Fe(1)-O(1) bond length is 2.00 Å. The Fe(1)-O(4) bond length is 1.91 Å. The Fe(1)-O(5) bond length is 2.01 Å. The Fe(1)-O(6) bond length is 1.91 Å. The Fe(1)-F(1) bond length is 2.07 Å. The Fe(1)-F(2) bond length is 2.06 Å. In the second Fe site, Fe(2) is bonded to one O(1), one O(5), two equivalent O(6), and two equivalent F(1) atoms to form FeO4F2 octahedra that share corners with four equivalent Fe(1)O4F2 octahedra, corners with four equivalent Fe(2)O4F2 octahedra,  an edgeedge with one Fe(1)O4F2 octahedra, and  an edgeedge with one Fe(3)O5F octahedra. The corner-sharing octahedral tilt angles range from 44-55°. The Fe(2)-O(1) bond length is 1.98 Å. The Fe(2)-O(5) bond length is 1.94 Å. There is one shorter (1.95 Å) and one longer (1.98 Å) Fe(2)-O(6) bond length. Both Fe(2)-F(1) bond lengths are 2.12 Å. In the third Fe site, Fe(3) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one F(2) atom to form a mixture of corner and edge-sharing FeO5F octahedra. The corner-sharing octahedral tilt angles range from 46-56°. The Fe(3)-O(1) bond length is 1.97 Å. The Fe(3)-O(2) bond length is 1.97 Å. The Fe(3)-O(4) bond length is 1.96 Å. The Fe(3)-O(5) bond length is 1.97 Å. The Fe(3)-O(7) bond length is 1.97 Å. The Fe(3)-F(2) bond length is 2.10 Å. In the fourth Fe site, Fe(4) is bonded to one O(2), one O(7), two equivalent O(3), and two equivalent F(3) atoms to form FeO4F2 octahedra that share corners with four equivalent Fe(4)O4F2 octahedra, corners with four equivalent Fe(5)O4F2 octahedra,  an edgeedge with one Fe(5)O4F2 octahedra, and  an edgeedge with one Fe(3)O5F octahedra. The corner-sharing octahedral tilt angles range from 46-59°. The Fe(4)-O(2) bond length is 1.94 Å. The Fe(4)-O(7) bond length is 1.97 Å. There is one shorter (1.95 Å) and one longer (1.96 Å) Fe(4)-O(3) bond length. There is one shorter (2.10 Å) and one longer (2.11 Å) Fe(4)-F(3) bond length. In the fifth Fe site, Fe(5) is bonded to one O(2), one O(3), one O(4), one O(7), one F(2), and one F(3) atom to form FeO4F2 octahedra that share corners with four equivalent Fe(4)O4F2 octahedra, corners with four equivalent Fe(3)O5F octahedra,  an edgeedge with one Fe(1)O4F2 octahedra, and  an edgeedge with one Fe(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 46-59°. The Fe(5)-O(2) bond length is 2.01 Å. The Fe(5)-O(3) bond length is 1.91 Å. The Fe(5)-O(4) bond length is 1.92 Å. The Fe(5)-O(7) bond length is 2.00 Å. The Fe(5)-F(2) bond length is 2.07 Å. The Fe(5)-F(3) bond length is 2.10 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Fe(3), one Fe(4), and one Fe(5) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Fe(5) and two equivalent Fe(4) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(3) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Fe(2) atoms. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Fe(3), one Fe(4), and one Fe(5) atom. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted trigonal planar geometry to one Fe(1) and two equivalent Fe(2) atoms. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Fe(5) and two equivalent Fe(4) atoms.