Fe10O11F9 is Hydrophilite-derived structured and crystallizes in the monoclinic Pm space group. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), one O(6), one F(1), one F(3), and one F(4) atom to form FeO3F3 octahedra that share corners with four equivalent Fe(4)O4F2 octahedra, corners with four equivalent Fe(5)O4F2 octahedra,  an edgeedge with one Fe(2)O2F4 octahedra, and  an edgeedge with one Fe(3)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 42-56°. In the second Fe site, Fe(2) is bonded to one O(4), one O(7), two equivalent F(1), and two equivalent F(3) atoms to form FeO2F4 octahedra that share corners with eight equivalent Fe(4)O4F2 octahedra and edges with two equivalent Fe(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. In the third Fe site, Fe(3) is bonded to one O(1), one O(2), one O(5), one F(2), one F(4), and one F(5) atom to form FeO3F3 octahedra that share corners with four equivalent Fe(6)O3F3 octahedra, corners with four equivalent Fe(5)O4F2 octahedra,  an edgeedge with one Fe(1)O3F3 octahedra, and  an edgeedge with one Fe(3)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 43-57°. In the fourth Fe site, Fe(4) is bonded to one O(3), one O(4), one O(6), one O(7), one F(1), and one F(3) atom to form FeO4F2 octahedra that share corners with four equivalent Fe(2)O2F4 octahedra, corners with four equivalent Fe(1)O3F3 octahedra,  an edgeedge with one Fe(4)O4F2 octahedra, and  an edgeedge with one Fe(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-52°. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(3), one O(5), one O(6), one F(2), and one F(4) atom to form FeO4F2 octahedra that share corners with four equivalent Fe(1)O3F3 octahedra, corners with four equivalent Fe(3)O3F3 octahedra,  an edgeedge with one Fe(6)O3F3 octahedra, and  an edgeedge with one Fe(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 43-56°. In the sixth Fe site, Fe(6) is bonded to one O(2), two equivalent O(5), one F(5), and two equivalent F(2) atoms to form FeO3F3 octahedra that share corners with eight equivalent Fe(3)O3F3 octahedra and edges with two equivalent Fe(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 46-57°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Fe(6) and two equivalent Fe(3) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(4), and one Fe(5) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(2) and two equivalent Fe(4) atoms. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Fe(3), one Fe(5), and one Fe(6) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(4), and one Fe(5) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Fe(2) and two equivalent Fe(4) atoms. There are five inequivalent F sites. In the first F site, F(1) is bonded in a distorted 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(3), one Fe(5), and one Fe(6) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom. In the fourth F site, F(4) is bonded in a 3-coordinate geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the fifth F site, F(5) is bonded in a distorted T-shaped geometry to one Fe(6) and two equivalent Fe(3) atoms.
Fe10O11F9 is Hydrophilite-derived structured and crystallizes in the monoclinic Pm space group. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), one O(6), one F(1), one F(3), and one F(4) atom to form FeO3F3 octahedra that share corners with four equivalent Fe(4)O4F2 octahedra, corners with four equivalent Fe(5)O4F2 octahedra,  an edgeedge with one Fe(2)O2F4 octahedra, and  an edgeedge with one Fe(3)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 42-56°. The Fe(1)-O(1) bond length is 1.91 Å. The Fe(1)-O(3) bond length is 1.98 Å. The Fe(1)-O(6) bond length is 1.97 Å. The Fe(1)-F(1) bond length is 2.09 Å. The Fe(1)-F(3) bond length is 2.12 Å. The Fe(1)-F(4) bond length is 2.02 Å. In the second Fe site, Fe(2) is bonded to one O(4), one O(7), two equivalent F(1), and two equivalent F(3) atoms to form FeO2F4 octahedra that share corners with eight equivalent Fe(4)O4F2 octahedra and edges with two equivalent Fe(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. The Fe(2)-O(4) bond length is 1.96 Å. The Fe(2)-O(7) bond length is 1.97 Å. Both Fe(2)-F(1) bond lengths are 2.02 Å. Both Fe(2)-F(3) bond lengths are 2.02 Å. In the third Fe site, Fe(3) is bonded to one O(1), one O(2), one O(5), one F(2), one F(4), and one F(5) atom to form FeO3F3 octahedra that share corners with four equivalent Fe(6)O3F3 octahedra, corners with four equivalent Fe(5)O4F2 octahedra,  an edgeedge with one Fe(1)O3F3 octahedra, and  an edgeedge with one Fe(3)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 43-57°. The Fe(3)-O(1) bond length is 1.96 Å. The Fe(3)-O(2) bond length is 1.94 Å. The Fe(3)-O(5) bond length is 1.92 Å. The Fe(3)-F(2) bond length is 2.07 Å. The Fe(3)-F(4) bond length is 2.14 Å. The Fe(3)-F(5) bond length is 2.12 Å. In the fourth Fe site, Fe(4) is bonded to one O(3), one O(4), one O(6), one O(7), one F(1), and one F(3) atom to form FeO4F2 octahedra that share corners with four equivalent Fe(2)O2F4 octahedra, corners with four equivalent Fe(1)O3F3 octahedra,  an edgeedge with one Fe(4)O4F2 octahedra, and  an edgeedge with one Fe(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-52°. The Fe(4)-O(3) bond length is 1.94 Å. The Fe(4)-O(4) bond length is 2.00 Å. The Fe(4)-O(6) bond length is 1.94 Å. The Fe(4)-O(7) bond length is 2.00 Å. The Fe(4)-F(1) bond length is 2.16 Å. The Fe(4)-F(3) bond length is 2.13 Å. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(3), one O(5), one O(6), one F(2), and one F(4) atom to form FeO4F2 octahedra that share corners with four equivalent Fe(1)O3F3 octahedra, corners with four equivalent Fe(3)O3F3 octahedra,  an edgeedge with one Fe(6)O3F3 octahedra, and  an edgeedge with one Fe(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 43-56°. The Fe(5)-O(1) bond length is 1.96 Å. The Fe(5)-O(3) bond length is 1.98 Å. The Fe(5)-O(5) bond length is 1.96 Å. The Fe(5)-O(6) bond length is 2.00 Å. The Fe(5)-F(2) bond length is 2.17 Å. The Fe(5)-F(4) bond length is 2.33 Å. In the sixth Fe site, Fe(6) is bonded to one O(2), two equivalent O(5), one F(5), and two equivalent F(2) atoms to form FeO3F3 octahedra that share corners with eight equivalent Fe(3)O3F3 octahedra and edges with two equivalent Fe(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 46-57°. The Fe(6)-O(2) bond length is 1.95 Å. Both Fe(6)-O(5) bond lengths are 1.93 Å. The Fe(6)-F(5) bond length is 2.33 Å. Both Fe(6)-F(2) bond lengths are 2.10 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Fe(6) and two equivalent Fe(3) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(4), and one Fe(5) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(2) and two equivalent Fe(4) atoms. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Fe(3), one Fe(5), and one Fe(6) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(4), and one Fe(5) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Fe(2) and two equivalent Fe(4) atoms. There are five inequivalent F sites. In the first F site, F(1) is bonded in a distorted 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(3), one Fe(5), and one Fe(6) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom. In the fourth F site, F(4) is bonded in a 3-coordinate geometry to one Fe(1), one Fe(3), and one Fe(5) atom. In the fifth F site, F(5) is bonded in a distorted T-shaped geometry to one Fe(6) and two equivalent Fe(3) atoms.