Fe3O5F is Hydrophilite-derived structured and crystallizes in the monoclinic C2/m space group. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(4), two equivalent O(1), two equivalent O(2), and one F(1) atom to form FeO5F octahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with five equivalent Fe(3)O4F2 octahedra,  an edgeedge with one Fe(1)O5F octahedra, and  an edgeedge with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with two equivalent Fe(4)O6 octahedra, corners with six equivalent Fe(1)O5F octahedra, and edges with two equivalent Fe(3)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 44-52°. In the third Fe site, Fe(3) is bonded to one O(3), one O(4), two equivalent O(2), and two equivalent F(1) atoms to form FeO4F2 octahedra that share corners with three equivalent Fe(4)O6 octahedra, corners with five equivalent Fe(1)O5F octahedra,  an edgeedge with one Fe(3)O4F2 octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. In the fourth Fe site, Fe(4) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with six equivalent Fe(3)O4F2 octahedra, and edges with two equivalent Fe(1)O5F octahedra. The corner-sharing octahedral tilt angles range from 44-53°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(2) and two equivalent Fe(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(3) atom. F(1) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Fe(3) atoms.
Fe3O5F is Hydrophilite-derived structured and crystallizes in the monoclinic C2/m space group. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(4), two equivalent O(1), two equivalent O(2), and one F(1) atom to form FeO5F octahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with five equivalent Fe(3)O4F2 octahedra,  an edgeedge with one Fe(1)O5F octahedra, and  an edgeedge with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. The Fe(1)-O(4) bond length is 1.98 Å. Both Fe(1)-O(1) bond lengths are 1.94 Å. Both Fe(1)-O(2) bond lengths are 1.94 Å. The Fe(1)-F(1) bond length is 2.24 Å. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form FeO6 octahedra that share corners with two equivalent Fe(4)O6 octahedra, corners with six equivalent Fe(1)O5F octahedra, and edges with two equivalent Fe(3)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 44-52°. Both Fe(2)-O(1) bond lengths are 2.03 Å. Both Fe(2)-O(3) bond lengths are 1.92 Å. Both Fe(2)-O(4) bond lengths are 1.89 Å. In the third Fe site, Fe(3) is bonded to one O(3), one O(4), two equivalent O(2), and two equivalent F(1) atoms to form FeO4F2 octahedra that share corners with three equivalent Fe(4)O6 octahedra, corners with five equivalent Fe(1)O5F octahedra,  an edgeedge with one Fe(3)O4F2 octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-54°. The Fe(3)-O(3) bond length is 1.95 Å. The Fe(3)-O(4) bond length is 1.97 Å. Both Fe(3)-O(2) bond lengths are 1.98 Å. There is one shorter (2.03 Å) and one longer (2.06 Å) Fe(3)-F(1) bond length. In the fourth Fe site, Fe(4) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with six equivalent Fe(3)O4F2 octahedra, and edges with two equivalent Fe(1)O5F octahedra. The corner-sharing octahedral tilt angles range from 44-53°. Both Fe(4)-O(3) bond lengths are 2.06 Å. All Fe(4)-O(2) bond lengths are 1.95 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(2) and two equivalent Fe(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(4) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(4) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(3) atom. F(1) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Fe(3) atoms.