Fe6OF11 is Hydrophilite-derived structured and crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one F(1), one F(4), one F(5), and two equivalent F(2) atoms to form FeOF5 octahedra that share corners with four equivalent Fe(4)F6 octahedra, corners with four equivalent Fe(3)OF5 octahedra,  an edgeedge with one Fe(2)F6 octahedra, and  an edgeedge with one Fe(1)OF5 octahedra. The corner-sharing octahedral tilt angles range from 43-54°. In the second Fe site, Fe(2) is bonded to two equivalent F(1), two equivalent F(3), and two equivalent F(5) atoms to form FeF6 octahedra that share corners with eight equivalent Fe(4)F6 octahedra and edges with two equivalent Fe(1)OF5 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. In the third Fe site, Fe(3) is bonded to one O(1), one F(4), and four equivalent F(2) atoms to form FeOF5 octahedra that share corners with eight equivalent Fe(1)OF5 octahedra and edges with two equivalent Fe(4)F6 octahedra. The corner-sharing octahedral tilt angles range from 44-54°. In the fourth Fe site, Fe(4) is bonded to one F(1), one F(5), two equivalent F(2), and two equivalent F(3) atoms to form FeF6 octahedra that share corners with four equivalent Fe(2)F6 octahedra, corners with four equivalent Fe(1)OF5 octahedra,  an edgeedge with one Fe(4)F6 octahedra, and  an edgeedge with one Fe(3)OF5 octahedra. The corner-sharing octahedral tilt angles range from 43-54°. O(1) is bonded in a distorted trigonal planar geometry to one Fe(3) and two equivalent Fe(1) atoms. There are five inequivalent F sites. In the first F site, F(1) is bonded in a trigonal planar 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(1), one Fe(3), and one Fe(4) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Fe(2) and two equivalent Fe(4) atoms. In the fourth F site, F(4) is bonded in a distorted T-shaped geometry to one Fe(3) and two equivalent Fe(1) atoms. In the fifth F site, F(5) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom.
Fe6OF11 is Hydrophilite-derived structured and crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one F(1), one F(4), one F(5), and two equivalent F(2) atoms to form FeOF5 octahedra that share corners with four equivalent Fe(4)F6 octahedra, corners with four equivalent Fe(3)OF5 octahedra,  an edgeedge with one Fe(2)F6 octahedra, and  an edgeedge with one Fe(1)OF5 octahedra. The corner-sharing octahedral tilt angles range from 43-54°. The Fe(1)-O(1) bond length is 1.93 Å. The Fe(1)-F(1) bond length is 2.14 Å. The Fe(1)-F(4) bond length is 2.12 Å. The Fe(1)-F(5) bond length is 2.18 Å. Both Fe(1)-F(2) bond lengths are 2.02 Å. In the second Fe site, Fe(2) is bonded to two equivalent F(1), two equivalent F(3), and two equivalent F(5) atoms to form FeF6 octahedra that share corners with eight equivalent Fe(4)F6 octahedra and edges with two equivalent Fe(1)OF5 octahedra. The corner-sharing octahedral tilt angles range from 50-54°. Both Fe(2)-F(1) bond lengths are 2.15 Å. Both Fe(2)-F(3) bond lengths are 2.05 Å. Both Fe(2)-F(5) bond lengths are 2.14 Å. In the third Fe site, Fe(3) is bonded to one O(1), one F(4), and four equivalent F(2) atoms to form FeOF5 octahedra that share corners with eight equivalent Fe(1)OF5 octahedra and edges with two equivalent Fe(4)F6 octahedra. The corner-sharing octahedral tilt angles range from 44-54°. The Fe(3)-O(1) bond length is 1.95 Å. The Fe(3)-F(4) bond length is 2.08 Å. All Fe(3)-F(2) bond lengths are 2.18 Å. In the fourth Fe site, Fe(4) is bonded to one F(1), one F(5), two equivalent F(2), and two equivalent F(3) atoms to form FeF6 octahedra that share corners with four equivalent Fe(2)F6 octahedra, corners with four equivalent Fe(1)OF5 octahedra,  an edgeedge with one Fe(4)F6 octahedra, and  an edgeedge with one Fe(3)OF5 octahedra. The corner-sharing octahedral tilt angles range from 43-54°. The Fe(4)-F(1) bond length is 2.08 Å. The Fe(4)-F(5) bond length is 2.06 Å. Both Fe(4)-F(2) bond lengths are 2.12 Å. Both Fe(4)-F(3) bond lengths are 2.14 Å. O(1) is bonded in a distorted trigonal planar geometry to one Fe(3) and two equivalent Fe(1) atoms. There are five inequivalent F sites. In the first F site, F(1) is bonded in a trigonal planar 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(1), one Fe(3), and one Fe(4) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Fe(2) and two equivalent Fe(4) atoms. In the fourth F site, F(4) is bonded in a distorted T-shaped geometry to one Fe(3) and two equivalent Fe(1) atoms. In the fifth F site, F(5) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom.