Fe6O11F is Hydrophilite-derived structured and crystallizes in the monoclinic Cm space group. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(8) atoms to form FeO6 octahedra that share corners with two equivalent Fe(3)O5F octahedra, corners with three equivalent Fe(6)O5F octahedra, corners with three equivalent Fe(2)O6 octahedra,  an edgeedge with one Fe(5)O5F octahedra, and  an edgeedge with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. In the second Fe site, Fe(2) is bonded to one O(3), one O(4), one O(6), one O(7), and two equivalent O(1) atoms to form FeO6 octahedra that share corners with two equivalent Fe(4)O6 octahedra, corners with three equivalent Fe(5)O5F octahedra, corners with three equivalent Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O5F octahedra, and  an edgeedge with one Fe(6)O5F octahedra. The corner-sharing octahedral tilt angles range from 45-51°. In the third Fe site, Fe(3) is bonded to one O(4), one O(5), one O(6), two equivalent O(2), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(5)O5F octahedra, corners with three equivalent Fe(4)O6 octahedra,  an edgeedge with one Fe(6)O5F octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-53°. In the fourth Fe site, Fe(4) is bonded to one O(3), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(3)O5F octahedra, corners with three equivalent Fe(6)O5F octahedra,  an edgeedge with one Fe(5)O5F octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. In the fifth Fe site, Fe(5) is bonded to one O(7), two equivalent O(1), two equivalent O(2), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Fe(6)O5F octahedra, corners with three equivalent Fe(3)O5F octahedra, corners with three equivalent Fe(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, and  an edgeedge with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-54°. In the sixth Fe site, Fe(6) is bonded to one O(3), one O(5), one O(7), two equivalent O(8), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Fe(5)O5F octahedra, corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(4)O6 octahedra,  an edgeedge with one Fe(3)O5F octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-54°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(5) atom. In the second O site, O(2) is bonded in a 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 distorted trigonal planar geometry to one Fe(2), one Fe(4), and one Fe(6) 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. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(6) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Fe(2), one Fe(5), and one Fe(6) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Fe(1), one Fe(4), and one Fe(6) atom. F(1) is bonded in a distorted trigonal planar geometry to one Fe(3), one Fe(5), and one Fe(6) atom.
Fe6O11F is Hydrophilite-derived structured and crystallizes in the monoclinic Cm space group. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(8) atoms to form FeO6 octahedra that share corners with two equivalent Fe(3)O5F octahedra, corners with three equivalent Fe(6)O5F octahedra, corners with three equivalent Fe(2)O6 octahedra,  an edgeedge with one Fe(5)O5F octahedra, and  an edgeedge with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-53°. The Fe(1)-O(4) bond length is 2.09 Å. The Fe(1)-O(5) bond length is 2.06 Å. Both Fe(1)-O(1) bond lengths are 1.94 Å. Both Fe(1)-O(8) bond lengths are 1.94 Å. In the second Fe site, Fe(2) is bonded to one O(3), one O(4), one O(6), one O(7), and two equivalent O(1) atoms to form FeO6 octahedra that share corners with two equivalent Fe(4)O6 octahedra, corners with three equivalent Fe(5)O5F octahedra, corners with three equivalent Fe(1)O6 octahedra,  an edgeedge with one Fe(3)O5F octahedra, and  an edgeedge with one Fe(6)O5F octahedra. The corner-sharing octahedral tilt angles range from 45-51°. The Fe(2)-O(3) bond length is 1.92 Å. The Fe(2)-O(4) bond length is 1.90 Å. The Fe(2)-O(6) bond length is 1.92 Å. The Fe(2)-O(7) bond length is 1.90 Å. Both Fe(2)-O(1) bond lengths are 2.01 Å. In the third Fe site, Fe(3) is bonded to one O(4), one O(5), one O(6), two equivalent O(2), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(5)O5F octahedra, corners with three equivalent Fe(4)O6 octahedra,  an edgeedge with one Fe(6)O5F octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-53°. The Fe(3)-O(4) bond length is 1.96 Å. The Fe(3)-O(5) bond length is 1.93 Å. The Fe(3)-O(6) bond length is 1.94 Å. Both Fe(3)-O(2) bond lengths are 1.98 Å. The Fe(3)-F(1) bond length is 2.07 Å. In the fourth Fe site, Fe(4) is bonded to one O(3), one O(6), two equivalent O(2), and two equivalent O(8) atoms to form FeO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(3)O5F octahedra, corners with three equivalent Fe(6)O5F octahedra,  an edgeedge with one Fe(5)O5F octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. The Fe(4)-O(3) bond length is 2.02 Å. The Fe(4)-O(6) bond length is 2.05 Å. Both Fe(4)-O(2) bond lengths are 1.95 Å. Both Fe(4)-O(8) bond lengths are 1.95 Å. In the fifth Fe site, Fe(5) is bonded to one O(7), two equivalent O(1), two equivalent O(2), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Fe(6)O5F octahedra, corners with three equivalent Fe(3)O5F octahedra, corners with three equivalent Fe(2)O6 octahedra,  an edgeedge with one Fe(1)O6 octahedra, and  an edgeedge with one Fe(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-54°. The Fe(5)-O(7) bond length is 1.96 Å. Both Fe(5)-O(1) bond lengths are 1.93 Å. Both Fe(5)-O(2) bond lengths are 1.94 Å. The Fe(5)-F(1) bond length is 2.11 Å. In the sixth Fe site, Fe(6) is bonded to one O(3), one O(5), one O(7), two equivalent O(8), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Fe(5)O5F octahedra, corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Fe(4)O6 octahedra,  an edgeedge with one Fe(3)O5F octahedra, and  an edgeedge with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-54°. The Fe(6)-O(3) bond length is 1.98 Å. The Fe(6)-O(5) bond length is 1.94 Å. The Fe(6)-O(7) bond length is 1.94 Å. Both Fe(6)-O(8) bond lengths are 1.99 Å. The Fe(6)-F(1) bond length is 2.05 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(5) atom. In the second O site, O(2) is bonded in a 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 distorted trigonal planar geometry to one Fe(2), one Fe(4), and one Fe(6) 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. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Fe(1), one Fe(3), and one Fe(6) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(3), and one Fe(4) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Fe(2), one Fe(5), and one Fe(6) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Fe(1), one Fe(4), and one Fe(6) atom. F(1) is bonded in a distorted trigonal planar geometry to one Fe(3), one Fe(5), and one Fe(6) atom.