MgFe6(O5F)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(5), one O(6), one O(9), and one F(2) atom to form MgO5F octahedra that share  a cornercorner with one Fe(5)O4F2 octahedra,  a cornercorner with one Fe(4)O5F octahedra, corners with two equivalent Fe(6)O5F octahedra,  a cornercorner with one Fe(3)O5 square pyramid,  an edgeedge with one Fe(3)O5 square pyramid,  a faceface with one Fe(5)O4F2 octahedra, and  a faceface with one Fe(4)O5F octahedra. The corner-sharing octahedral tilt angles range from 46-50°. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(5), one O(6), and one O(8) atom. In the second Fe site, Fe(2) is bonded to one O(10), one O(3), one O(4), one O(7), and one O(8) atom to form distorted FeO5 square pyramids that share  a cornercorner with one Fe(5)O4F2 octahedra, corners with two equivalent Fe(4)O5F octahedra, corners with three equivalent Fe(6)O5F octahedra, and  an edgeedge with one Fe(3)O5 square pyramid. The corner-sharing octahedral tilt angles range from 45-52°. In the third Fe site, Fe(3) is bonded to one O(3), one O(5), one O(6), one O(7), and one O(9) atom to form distorted FeO5 square pyramids that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Fe(4)O5F octahedra, corners with two equivalent Fe(6)O5F octahedra, corners with three equivalent Fe(5)O4F2 octahedra,  an edgeedge with one Mg(1)O5F octahedra, and  an edgeedge with one Fe(2)O5 square pyramid. The corner-sharing octahedral tilt angles range from 40-76°. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(10), one O(2), one O(4), one O(6), and one F(2) atom to form distorted FeO5F octahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Fe(3)O5 square pyramid, corners with two equivalent Fe(2)O5 square pyramids,  an edgeedge with one Fe(5)O4F2 octahedra,  an edgeedge with one Fe(6)O5F octahedra, and  a faceface with one Mg(1)O5F octahedra. The corner-sharing octahedral tilt angles are 50°. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(5), one O(7), one O(9), one F(1), and one F(2) atom to form distorted FeO4F2 octahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Fe(2)O5 square pyramid, corners with three equivalent Fe(3)O5 square pyramids,  an edgeedge with one Fe(4)O5F octahedra,  an edgeedge with one Fe(6)O5F octahedra, and  a faceface with one Mg(1)O5F octahedra. The corner-sharing octahedral tilt angles are 48°. In the sixth Fe site, Fe(6) is bonded to one O(10), one O(2), one O(3), one O(8), one O(9), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Mg(1)O5F octahedra, corners with two equivalent Fe(3)O5 square pyramids, corners with three equivalent Fe(2)O5 square pyramids,  an edgeedge with one Fe(5)O4F2 octahedra, and  an edgeedge with one Fe(4)O5F octahedra. The corner-sharing octahedral tilt angles range from 46-47°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(4), and one Fe(5) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Fe(1), one Fe(4), and one Fe(6) 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(6) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Fe(1), one Fe(3), and one Fe(5) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one Fe(1), 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(3), and one Fe(5) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(6) atom. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one Mg(1), one Fe(3), one Fe(5), and one Fe(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(4), and one Fe(6) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted L-shaped geometry to one Fe(5) and one Fe(6) atom. In the second F site, F(2) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(4), and one Fe(5) atom.
MgFe6(O5F)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(5), one O(6), one O(9), and one F(2) atom to form MgO5F octahedra that share  a cornercorner with one Fe(5)O4F2 octahedra,  a cornercorner with one Fe(4)O5F octahedra, corners with two equivalent Fe(6)O5F octahedra,  a cornercorner with one Fe(3)O5 square pyramid,  an edgeedge with one Fe(3)O5 square pyramid,  a faceface with one Fe(5)O4F2 octahedra, and  a faceface with one Fe(4)O5F octahedra. The corner-sharing octahedral tilt angles range from 46-50°. The Mg(1)-O(1) bond length is 2.04 Å. The Mg(1)-O(2) bond length is 2.10 Å. The Mg(1)-O(5) bond length is 1.98 Å. The Mg(1)-O(6) bond length is 1.99 Å. The Mg(1)-O(9) bond length is 2.07 Å. The Mg(1)-F(2) bond length is 2.08 Å. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 5-coordinate geometry to one O(2), one O(4), one O(5), one O(6), and one O(8) atom. The Fe(1)-O(2) bond length is 1.98 Å. The Fe(1)-O(4) bond length is 1.98 Å. The Fe(1)-O(5) bond length is 2.12 Å. The Fe(1)-O(6) bond length is 1.95 Å. The Fe(1)-O(8) bond length is 1.96 Å. In the second Fe site, Fe(2) is bonded to one O(10), one O(3), one O(4), one O(7), and one O(8) atom to form distorted FeO5 square pyramids that share  a cornercorner with one Fe(5)O4F2 octahedra, corners with two equivalent Fe(4)O5F octahedra, corners with three equivalent Fe(6)O5F octahedra, and  an edgeedge with one Fe(3)O5 square pyramid. The corner-sharing octahedral tilt angles range from 45-52°. The Fe(2)-O(10) bond length is 1.99 Å. The Fe(2)-O(3) bond length is 1.95 Å. The Fe(2)-O(4) bond length is 1.91 Å. The Fe(2)-O(7) bond length is 1.93 Å. The Fe(2)-O(8) bond length is 1.93 Å. In the third Fe site, Fe(3) is bonded to one O(3), one O(5), one O(6), one O(7), and one O(9) atom to form distorted FeO5 square pyramids that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Fe(4)O5F octahedra, corners with two equivalent Fe(6)O5F octahedra, corners with three equivalent Fe(5)O4F2 octahedra,  an edgeedge with one Mg(1)O5F octahedra, and  an edgeedge with one Fe(2)O5 square pyramid. The corner-sharing octahedral tilt angles range from 40-76°. The Fe(3)-O(3) bond length is 1.93 Å. The Fe(3)-O(5) bond length is 1.94 Å. The Fe(3)-O(6) bond length is 1.99 Å. The Fe(3)-O(7) bond length is 1.98 Å. The Fe(3)-O(9) bond length is 2.06 Å. In the fourth Fe site, Fe(4) is bonded to one O(1), one O(10), one O(2), one O(4), one O(6), and one F(2) atom to form distorted FeO5F octahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Fe(3)O5 square pyramid, corners with two equivalent Fe(2)O5 square pyramids,  an edgeedge with one Fe(5)O4F2 octahedra,  an edgeedge with one Fe(6)O5F octahedra, and  a faceface with one Mg(1)O5F octahedra. The corner-sharing octahedral tilt angles are 50°. The Fe(4)-O(1) bond length is 1.96 Å. The Fe(4)-O(10) bond length is 1.91 Å. The Fe(4)-O(2) bond length is 2.04 Å. The Fe(4)-O(4) bond length is 1.93 Å. The Fe(4)-O(6) bond length is 2.35 Å. The Fe(4)-F(2) bond length is 2.06 Å. In the fifth Fe site, Fe(5) is bonded to one O(1), one O(5), one O(7), one O(9), one F(1), and one F(2) atom to form distorted FeO4F2 octahedra that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Fe(2)O5 square pyramid, corners with three equivalent Fe(3)O5 square pyramids,  an edgeedge with one Fe(4)O5F octahedra,  an edgeedge with one Fe(6)O5F octahedra, and  a faceface with one Mg(1)O5F octahedra. The corner-sharing octahedral tilt angles are 48°. The Fe(5)-O(1) bond length is 1.87 Å. The Fe(5)-O(5) bond length is 2.21 Å. The Fe(5)-O(7) bond length is 1.95 Å. The Fe(5)-O(9) bond length is 2.06 Å. The Fe(5)-F(1) bond length is 1.94 Å. The Fe(5)-F(2) bond length is 2.15 Å. In the sixth Fe site, Fe(6) is bonded to one O(10), one O(2), one O(3), one O(8), one O(9), and one F(1) atom to form FeO5F octahedra that share corners with two equivalent Mg(1)O5F octahedra, corners with two equivalent Fe(3)O5 square pyramids, corners with three equivalent Fe(2)O5 square pyramids,  an edgeedge with one Fe(5)O4F2 octahedra, and  an edgeedge with one Fe(4)O5F octahedra. The corner-sharing octahedral tilt angles range from 46-47°. The Fe(6)-O(10) bond length is 1.97 Å. The Fe(6)-O(2) bond length is 2.06 Å. The Fe(6)-O(3) bond length is 2.07 Å. The Fe(6)-O(8) bond length is 2.02 Å. The Fe(6)-O(9) bond length is 2.03 Å. The Fe(6)-F(1) bond length is 2.09 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(4), and one Fe(5) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Fe(1), one Fe(4), and one Fe(6) 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(6) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Fe(1), one Fe(3), and one Fe(5) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Mg(1), one Fe(1), 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(3), and one Fe(5) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to one Fe(1), one Fe(2), and one Fe(6) atom. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one Mg(1), one Fe(3), one Fe(5), and one Fe(6) atom. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Fe(2), one Fe(4), and one Fe(6) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted L-shaped geometry to one Fe(5) and one Fe(6) atom. In the second F site, F(2) is bonded in a distorted T-shaped geometry to one Mg(1), one Fe(4), and one Fe(5) atom.