MgMn6(O5F)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(4), one O(6), one O(8), one F(1), and one F(2) atom to form distorted MgO4F2 octahedra that share  a cornercorner with one Mn(2)O5F octahedra, corners with two equivalent Mn(6)O5F octahedra,  a cornercorner with one Mn(5)O4F square pyramid,  an edgeedge with one Mn(5)O4F square pyramid, and  a faceface with one Mn(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 44-51°. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(5), one O(8), one O(9), and one F(2) atom. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(4), one O(6), one O(8), and one F(2) atom to form MnO5F octahedra that share  a cornercorner with one Mg(1)O4F2 octahedra, corners with two equivalent Mn(5)O4F square pyramids,  an edgeedge with one Mn(6)O5F octahedra, and  a faceface with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles are 51°. In the third Mn site, Mn(3) is bonded in a 4-coordinate geometry to one O(10), one O(2), one O(5), one O(6), and one O(7) atom. In the fourth Mn site, Mn(4) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(3), one O(7), and one O(9) atom. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(2), one O(7), one O(8), and one F(1) atom to form distorted MnO4F square pyramids that share  a cornercorner with one Mg(1)O4F2 octahedra,  a cornercorner with one Mn(6)O5F octahedra, corners with two equivalent Mn(2)O5F octahedra, and  an edgeedge with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 48-82°. In the sixth Mn site, Mn(6) is bonded to one O(10), one O(3), one O(4), one O(5), one O(9), and one F(1) atom to form MnO5F octahedra that share corners with two equivalent Mg(1)O4F2 octahedra,  a cornercorner with one Mn(5)O4F square pyramid, and  an edgeedge with one Mn(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 44-47°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(5) atom. In the second O site, O(2) is bonded to one Mg(1), one Mn(3), one Mn(4), and one Mn(5) atom to form distorted corner-sharing OMgMn3 trigonal pyramids. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(4), and one Mn(6) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(2), and one Mn(6) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(3), and one Mn(6) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Mn(3), one Mn(4), and one Mn(5) atom. In the eighth O site, O(8) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Mn(5) atom to form corner-sharing OMgMn3 trigonal pyramids. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Mn(1), one Mn(4), and one Mn(6) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(3), one Mn(4), and one Mn(6) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(5), and one Mn(6) atom. In the second F site, F(2) is bonded in a distorted bent 120 degrees geometry to one Mg(1), one Mn(1), and one Mn(2) atom.
MgMn6(O5F)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(4), one O(6), one O(8), one F(1), and one F(2) atom to form distorted MgO4F2 octahedra that share  a cornercorner with one Mn(2)O5F octahedra, corners with two equivalent Mn(6)O5F octahedra,  a cornercorner with one Mn(5)O4F square pyramid,  an edgeedge with one Mn(5)O4F square pyramid, and  a faceface with one Mn(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 44-51°. The Mg(1)-O(2) bond length is 2.00 Å. The Mg(1)-O(4) bond length is 2.26 Å. The Mg(1)-O(6) bond length is 2.04 Å. The Mg(1)-O(8) bond length is 2.04 Å. The Mg(1)-F(1) bond length is 2.03 Å. The Mg(1)-F(2) bond length is 1.97 Å. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(5), one O(8), one O(9), and one F(2) atom. The Mn(1)-O(1) bond length is 1.93 Å. The Mn(1)-O(10) bond length is 1.96 Å. The Mn(1)-O(5) bond length is 2.15 Å. The Mn(1)-O(8) bond length is 1.95 Å. The Mn(1)-O(9) bond length is 1.96 Å. The Mn(1)-F(2) bond length is 2.66 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(4), one O(6), one O(8), and one F(2) atom to form MnO5F octahedra that share  a cornercorner with one Mg(1)O4F2 octahedra, corners with two equivalent Mn(5)O4F square pyramids,  an edgeedge with one Mn(6)O5F octahedra, and  a faceface with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles are 51°. The Mn(2)-O(1) bond length is 1.88 Å. The Mn(2)-O(3) bond length is 1.89 Å. The Mn(2)-O(4) bond length is 1.89 Å. The Mn(2)-O(6) bond length is 1.92 Å. The Mn(2)-O(8) bond length is 2.00 Å. The Mn(2)-F(2) bond length is 1.98 Å. In the third Mn site, Mn(3) is bonded in a 4-coordinate geometry to one O(10), one O(2), one O(5), one O(6), and one O(7) atom. The Mn(3)-O(10) bond length is 2.59 Å. The Mn(3)-O(2) bond length is 2.11 Å. The Mn(3)-O(5) bond length is 1.86 Å. The Mn(3)-O(6) bond length is 1.86 Å. The Mn(3)-O(7) bond length is 1.96 Å. In the fourth Mn site, Mn(4) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(3), one O(7), and one O(9) atom. The Mn(4)-O(10) bond length is 2.00 Å. The Mn(4)-O(2) bond length is 2.04 Å. The Mn(4)-O(3) bond length is 2.10 Å. The Mn(4)-O(7) bond length is 1.96 Å. The Mn(4)-O(9) bond length is 1.97 Å. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(2), one O(7), one O(8), and one F(1) atom to form distorted MnO4F square pyramids that share  a cornercorner with one Mg(1)O4F2 octahedra,  a cornercorner with one Mn(6)O5F octahedra, corners with two equivalent Mn(2)O5F octahedra, and  an edgeedge with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 48-82°. The Mn(5)-O(1) bond length is 1.94 Å. The Mn(5)-O(2) bond length is 1.94 Å. The Mn(5)-O(7) bond length is 1.93 Å. The Mn(5)-O(8) bond length is 1.96 Å. The Mn(5)-F(1) bond length is 2.25 Å. In the sixth Mn site, Mn(6) is bonded to one O(10), one O(3), one O(4), one O(5), one O(9), and one F(1) atom to form MnO5F octahedra that share corners with two equivalent Mg(1)O4F2 octahedra,  a cornercorner with one Mn(5)O4F square pyramid, and  an edgeedge with one Mn(2)O5F octahedra. The corner-sharing octahedral tilt angles range from 44-47°. The Mn(6)-O(10) bond length is 1.99 Å. The Mn(6)-O(3) bond length is 1.95 Å. The Mn(6)-O(4) bond length is 1.89 Å. The Mn(6)-O(5) bond length is 1.90 Å. The Mn(6)-O(9) bond length is 1.93 Å. The Mn(6)-F(1) bond length is 2.11 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(5) atom. In the second O site, O(2) is bonded to one Mg(1), one Mn(3), one Mn(4), and one Mn(5) atom to form distorted corner-sharing OMgMn3 trigonal pyramids. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(4), and one Mn(6) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(2), and one Mn(6) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(3), and one Mn(6) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Mn(3), one Mn(4), and one Mn(5) atom. In the eighth O site, O(8) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Mn(5) atom to form corner-sharing OMgMn3 trigonal pyramids. In the ninth O site, O(9) is bonded in a trigonal planar geometry to one Mn(1), one Mn(4), and one Mn(6) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Mn(1), one Mn(3), one Mn(4), and one Mn(6) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(5), and one Mn(6) atom. In the second F site, F(2) is bonded in a distorted bent 120 degrees geometry to one Mg(1), one Mn(1), and one Mn(2) atom.