Fe5O3F7 is Hydrophilite-derived structured and crystallizes in the monoclinic Pc space group. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(3), one F(1), one F(3), one F(4), and one F(6) atom to form FeO2F4 octahedra that share corners with four equivalent Fe(4)O2F4 octahedra, corners with four equivalent Fe(3)OF5 octahedra,  an edgeedge with one Fe(2)O2F4 octahedra, and  an edgeedge with one Fe(5)O2F4 octahedra. The corner-sharing octahedral tilt angles range from 38-55°. In the second Fe site, Fe(2) is bonded to one O(1), one O(3), one F(1), one F(2), one F(5), and one F(7) atom to form FeO2F4 octahedra that share corners with four equivalent Fe(4)O2F4 octahedra, corners with four equivalent Fe(5)O2F4 octahedra,  an edgeedge with one Fe(1)O2F4 octahedra, and  an edgeedge with one Fe(3)OF5 octahedra. The corner-sharing octahedral tilt angles range from 43-60°. In the third Fe site, Fe(3) is bonded to one O(2), one F(2), one F(3), one F(4), one F(6), and one F(7) atom to form a mixture of corner and edge-sharing FeOF5 octahedra. The corner-sharing octahedral tilt angles range from 44-59°. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(3), one F(1), one F(3), one F(4), and one F(5) atom to form FeO2F4 octahedra that share corners with four equivalent Fe(1)O2F4 octahedra, corners with four equivalent Fe(2)O2F4 octahedra,  an edgeedge with one Fe(5)O2F4 octahedra, and  an edgeedge with one Fe(3)OF5 octahedra. The corner-sharing octahedral tilt angles range from 38-60°. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(2), one F(2), one F(5), one F(6), and one F(7) atom to form FeO2F4 octahedra that share corners with four equivalent Fe(2)O2F4 octahedra, corners with four equivalent Fe(3)OF5 octahedra,  an edgeedge with one Fe(1)O2F4 octahedra, and  an edgeedge with one Fe(4)O2F4 octahedra. The corner-sharing octahedral tilt angles range from 43-59°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(2), one Fe(4), and one Fe(5) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a distorted T-shaped geometry to one Fe(1), one Fe(2), and one Fe(4) atom. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(5) atom. In the third F site, F(3) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(4) atom. In the fourth F site, F(4) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(4) atom. In the fifth F site, F(5) is bonded in a distorted T-shaped geometry to one Fe(2), one Fe(4), and one Fe(5) atom. In the sixth F site, F(6) is bonded in a distorted T-shaped geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the seventh F site, F(7) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(5) atom.
Fe5O3F7 is Hydrophilite-derived structured and crystallizes in the monoclinic Pc space group. There are five inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), one O(3), one F(1), one F(3), one F(4), and one F(6) atom to form FeO2F4 octahedra that share corners with four equivalent Fe(4)O2F4 octahedra, corners with four equivalent Fe(3)OF5 octahedra,  an edgeedge with one Fe(2)O2F4 octahedra, and  an edgeedge with one Fe(5)O2F4 octahedra. The corner-sharing octahedral tilt angles range from 38-55°. The Fe(1)-O(2) bond length is 1.92 Å. The Fe(1)-O(3) bond length is 1.92 Å. The Fe(1)-F(1) bond length is 2.07 Å. The Fe(1)-F(3) bond length is 2.08 Å. The Fe(1)-F(4) bond length is 2.06 Å. The Fe(1)-F(6) bond length is 2.10 Å. In the second Fe site, Fe(2) is bonded to one O(1), one O(3), one F(1), one F(2), one F(5), and one F(7) atom to form FeO2F4 octahedra that share corners with four equivalent Fe(4)O2F4 octahedra, corners with four equivalent Fe(5)O2F4 octahedra,  an edgeedge with one Fe(1)O2F4 octahedra, and  an edgeedge with one Fe(3)OF5 octahedra. The corner-sharing octahedral tilt angles range from 43-60°. The Fe(2)-O(1) bond length is 2.07 Å. The Fe(2)-O(3) bond length is 2.05 Å. The Fe(2)-F(1) bond length is 2.20 Å. The Fe(2)-F(2) bond length is 2.17 Å. The Fe(2)-F(5) bond length is 2.18 Å. The Fe(2)-F(7) bond length is 2.16 Å. In the third Fe site, Fe(3) is bonded to one O(2), one F(2), one F(3), one F(4), one F(6), and one F(7) atom to form a mixture of corner and edge-sharing FeOF5 octahedra. The corner-sharing octahedral tilt angles range from 44-59°. The Fe(3)-O(2) bond length is 2.07 Å. The Fe(3)-F(2) bond length is 2.10 Å. The Fe(3)-F(3) bond length is 2.14 Å. The Fe(3)-F(4) bond length is 2.13 Å. The Fe(3)-F(6) bond length is 2.19 Å. The Fe(3)-F(7) bond length is 2.09 Å. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(3), one F(1), one F(3), one F(4), and one F(5) atom to form FeO2F4 octahedra that share corners with four equivalent Fe(1)O2F4 octahedra, corners with four equivalent Fe(2)O2F4 octahedra,  an edgeedge with one Fe(5)O2F4 octahedra, and  an edgeedge with one Fe(3)OF5 octahedra. The corner-sharing octahedral tilt angles range from 38-60°. The Fe(4)-O(1) bond length is 1.89 Å. The Fe(4)-O(3) bond length is 1.91 Å. The Fe(4)-F(1) bond length is 2.18 Å. The Fe(4)-F(3) bond length is 2.08 Å. The Fe(4)-F(4) bond length is 2.13 Å. The Fe(4)-F(5) bond length is 2.06 Å. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(2), one F(2), one F(5), one F(6), and one F(7) atom to form FeO2F4 octahedra that share corners with four equivalent Fe(2)O2F4 octahedra, corners with four equivalent Fe(3)OF5 octahedra,  an edgeedge with one Fe(1)O2F4 octahedra, and  an edgeedge with one Fe(4)O2F4 octahedra. The corner-sharing octahedral tilt angles range from 43-59°. The Fe(5)-O(1) bond length is 1.91 Å. The Fe(5)-O(2) bond length is 1.90 Å. The Fe(5)-F(2) bond length is 2.04 Å. The Fe(5)-F(5) bond length is 2.18 Å. The Fe(5)-F(6) bond length is 2.15 Å. The Fe(5)-F(7) bond length is 2.03 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(2), one Fe(4), and one Fe(5) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom. There are seven inequivalent F sites. In the first F site, F(1) is bonded in a distorted T-shaped geometry to one Fe(1), one Fe(2), and one Fe(4) atom. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(5) atom. In the third F site, F(3) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(4) atom. In the fourth F site, F(4) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(4) atom. In the fifth F site, F(5) is bonded in a distorted T-shaped geometry to one Fe(2), one Fe(4), and one Fe(5) atom. In the sixth F site, F(6) is bonded in a distorted T-shaped geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the seventh F site, F(7) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(5) atom.