MgMn12(O7F5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(14), one O(6), one O(8), one O(9), one F(10), and one F(4) atom to form MgO4F2 octahedra that share corners with two equivalent Mn(8)O3F3 octahedra, corners with two equivalent Mn(7)O4F2 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(5)O4F2 octahedra, edges with two equivalent Mn(4)O4F2 octahedra, and faces with two equivalent Mn(12)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 36-51°. There are twelve inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(12), one O(5), one F(2), one F(6), and one F(7) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(7)O4F2 octahedra, corners with two equivalent Mn(9)O4F2 octahedra, corners with four equivalent Mn(11)O3F3 octahedra,  an edgeedge with one Mn(2)O3F3 octahedra, and  an edgeedge with one Mn(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-58°. In the second Mn site, Mn(2) is bonded to one O(1), one O(11), one O(4), one F(1), one F(5), and one F(7) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(11)O3F3 octahedra, corners with two equivalent Mn(10)O4F2 octahedra, corners with four equivalent Mn(9)O4F2 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra, and  an edgeedge with one Mn(3)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 43-62°. In the third Mn site, Mn(3) is bonded to one O(10), one O(3), one O(4), one O(7), one F(5), and one F(8) atom to form distorted MnO4F2 octahedra that share corners with two equivalent Mn(8)O3F3 octahedra, corners with two equivalent Mn(9)O4F2 octahedra, corners with four equivalent Mn(10)O4F2 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra, and  an edgeedge with one Mn(2)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 42-56°. In the fourth Mn site, Mn(4) is bonded to one O(14), one O(2), one O(6), one O(9), one F(10), and one F(9) atom to form distorted MnO4F2 octahedra that share corners with two equivalent Mn(8)O3F3 octahedra, corners with two equivalent Mn(7)O4F2 octahedra, corners with four equivalent Mn(12)O4F2 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(5)O4F2 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 39-58°. In the fifth Mn site, Mn(5) is bonded to one O(13), one O(2), one O(5), one O(8), one F(10), and one F(6) atom to form distorted MnO4F2 octahedra that share corners with two equivalent Mn(11)O3F3 octahedra, corners with two equivalent Mn(12)O4F2 octahedra, corners with four equivalent Mn(7)O4F2 octahedra,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra, and  an edgeedge with one Mn(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-59°. In the sixth Mn site, Mn(6) is bonded to one O(3), one O(6), one F(3), one F(4), one F(8), and one F(9) atom to form MnO2F4 octahedra that share corners with two equivalent Mn(10)O4F2 octahedra, corners with two equivalent Mn(12)O4F2 octahedra, corners with four equivalent Mn(8)O3F3 octahedra,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(3)O4F2 octahedra, and  an edgeedge with one Mn(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 44-63°. In the seventh Mn site, Mn(7) is bonded to one O(13), one O(14), one O(2), one O(8), one F(2), and one F(6) atom to form MnO4F2 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with two equivalent Mn(1)O3F3 octahedra, corners with two equivalent Mn(4)O4F2 octahedra, corners with four equivalent Mn(5)O4F2 octahedra,  an edgeedge with one Mn(11)O3F3 octahedra, and  an edgeedge with one Mn(12)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 41-59°. In the eighth Mn site, Mn(8) is bonded to one O(10), one O(3), one O(9), one F(3), one F(4), and one F(9) atom to form distorted MnO3F3 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with two equivalent Mn(3)O4F2 octahedra, corners with two equivalent Mn(4)O4F2 octahedra, corners with four equivalent Mn(6)O2F4 octahedra,  an edgeedge with one Mn(10)O4F2 octahedra, and  an edgeedge with one Mn(12)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 36-63°. In the ninth Mn site, Mn(9) is bonded to one O(1), one O(11), one O(12), one O(7), one F(1), and one F(5) atom to form MnO4F2 octahedra that share corners with two equivalent Mn(1)O3F3 octahedra, corners with two equivalent Mn(3)O4F2 octahedra, corners with four equivalent Mn(2)O3F3 octahedra,  an edgeedge with one Mn(11)O3F3 octahedra, and  an edgeedge with one Mn(10)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 46-62°. In the tenth Mn site, Mn(10) is bonded to one O(10), one O(11), one O(4), one O(7), one F(3), and one F(8) atom to form MnO4F2 octahedra that share corners with two equivalent Mn(6)O2F4 octahedra, corners with two equivalent Mn(2)O3F3 octahedra, corners with four equivalent Mn(3)O4F2 octahedra,  an edgeedge with one Mn(8)O3F3 octahedra, and  an edgeedge with one Mn(9)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-59°. In the eleventh Mn site, Mn(11) is bonded to one O(12), one O(13), one O(5), one F(1), one F(2), and one F(7) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(2)O3F3 octahedra, corners with two equivalent Mn(5)O4F2 octahedra, corners with four equivalent Mn(1)O3F3 octahedra,  an edgeedge with one Mn(7)O4F2 octahedra, and  an edgeedge with one Mn(9)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 43-59°. In the twelfth Mn site, Mn(12) is bonded to one O(14), one O(6), one O(8), one O(9), one F(10), and one F(4) atom to form MnO4F2 octahedra that share corners with two equivalent Mn(6)O2F4 octahedra, corners with two equivalent Mn(5)O4F2 octahedra, corners with four equivalent Mn(4)O4F2 octahedra,  an edgeedge with one Mn(8)O3F3 octahedra,  an edgeedge with one Mn(7)O4F2 octahedra, and faces with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 40-58°. There are fourteen 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(9) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mn(4), one Mn(5), and one Mn(7) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(3), one Mn(6), and one Mn(8) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(10), one Mn(2), and one Mn(3) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mn(1), one Mn(11), and one Mn(5) atom. In the sixth O site, O(6) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Mn(12), one Mn(4), and one Mn(6) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Mn(10), one Mn(3), and one Mn(9) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(12), one Mn(5), and one Mn(7) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Mg(1), one Mn(12), one Mn(4), and one Mn(8) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Mn(10), one Mn(3), and one Mn(8) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Mn(10), one Mn(2), and one Mn(9) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Mn(1), one Mn(11), and one Mn(9) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Mn(11), one Mn(5), and one Mn(7) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Mg(1), one Mn(12), one Mn(4), and one Mn(7) atom. There are ten inequivalent F sites. In the first F site, F(1) is bonded in a distorted trigonal planar geometry to one Mn(11), one Mn(2), and one Mn(9) atom. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(11), and one Mn(7) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Mn(10), one Mn(6), and one Mn(8) atom. In the fourth F site, F(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(12), one Mn(6), and one Mn(8) atom. In the fifth F site, F(5) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(3), and one Mn(9) atom. In the sixth F site, F(6) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(5), and one Mn(7) atom. In the seventh F site, F(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(11), and one Mn(2) atom. In the eighth F site, F(8) is bonded in a 3-coordinate geometry to one Mn(10), one Mn(3), and one Mn(6) atom. In the ninth F site, F(9) is bonded in a distorted trigonal planar geometry to one Mn(4), one Mn(6), and one Mn(8) atom. In the tenth F site, F(10) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(12), one Mn(4), and one Mn(5) atom.
MgMn12(O7F5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(14), one O(6), one O(8), one O(9), one F(10), and one F(4) atom to form MgO4F2 octahedra that share corners with two equivalent Mn(8)O3F3 octahedra, corners with two equivalent Mn(7)O4F2 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(5)O4F2 octahedra, edges with two equivalent Mn(4)O4F2 octahedra, and faces with two equivalent Mn(12)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 36-51°. The Mg(1)-O(14) bond length is 1.97 Å. The Mg(1)-O(6) bond length is 2.02 Å. The Mg(1)-O(8) bond length is 2.05 Å. The Mg(1)-O(9) bond length is 2.03 Å. The Mg(1)-F(10) bond length is 2.00 Å. The Mg(1)-F(4) bond length is 2.02 Å. There are twelve inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(12), one O(5), one F(2), one F(6), and one F(7) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(7)O4F2 octahedra, corners with two equivalent Mn(9)O4F2 octahedra, corners with four equivalent Mn(11)O3F3 octahedra,  an edgeedge with one Mn(2)O3F3 octahedra, and  an edgeedge with one Mn(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-58°. The Mn(1)-O(1) bond length is 1.93 Å. The Mn(1)-O(12) bond length is 1.99 Å. The Mn(1)-O(5) bond length is 2.05 Å. The Mn(1)-F(2) bond length is 2.12 Å. The Mn(1)-F(6) bond length is 2.09 Å. The Mn(1)-F(7) bond length is 2.18 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(11), one O(4), one F(1), one F(5), and one F(7) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(11)O3F3 octahedra, corners with two equivalent Mn(10)O4F2 octahedra, corners with four equivalent Mn(9)O4F2 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra, and  an edgeedge with one Mn(3)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 43-62°. The Mn(2)-O(1) bond length is 2.05 Å. The Mn(2)-O(11) bond length is 2.03 Å. The Mn(2)-O(4) bond length is 1.92 Å. The Mn(2)-F(1) bond length is 2.12 Å. The Mn(2)-F(5) bond length is 2.16 Å. The Mn(2)-F(7) bond length is 2.01 Å. In the third Mn site, Mn(3) is bonded to one O(10), one O(3), one O(4), one O(7), one F(5), and one F(8) atom to form distorted MnO4F2 octahedra that share corners with two equivalent Mn(8)O3F3 octahedra, corners with two equivalent Mn(9)O4F2 octahedra, corners with four equivalent Mn(10)O4F2 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra, and  an edgeedge with one Mn(2)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 42-56°. The Mn(3)-O(10) bond length is 2.03 Å. The Mn(3)-O(3) bond length is 1.90 Å. The Mn(3)-O(4) bond length is 2.10 Å. The Mn(3)-O(7) bond length is 2.06 Å. The Mn(3)-F(5) bond length is 1.97 Å. The Mn(3)-F(8) bond length is 2.40 Å. In the fourth Mn site, Mn(4) is bonded to one O(14), one O(2), one O(6), one O(9), one F(10), and one F(9) atom to form distorted MnO4F2 octahedra that share corners with two equivalent Mn(8)O3F3 octahedra, corners with two equivalent Mn(7)O4F2 octahedra, corners with four equivalent Mn(12)O4F2 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(5)O4F2 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 39-58°. The Mn(4)-O(14) bond length is 2.16 Å. The Mn(4)-O(2) bond length is 1.88 Å. The Mn(4)-O(6) bond length is 2.00 Å. The Mn(4)-O(9) bond length is 2.11 Å. The Mn(4)-F(10) bond length is 2.23 Å. The Mn(4)-F(9) bond length is 2.08 Å. In the fifth Mn site, Mn(5) is bonded to one O(13), one O(2), one O(5), one O(8), one F(10), and one F(6) atom to form distorted MnO4F2 octahedra that share corners with two equivalent Mn(11)O3F3 octahedra, corners with two equivalent Mn(12)O4F2 octahedra, corners with four equivalent Mn(7)O4F2 octahedra,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra, and  an edgeedge with one Mn(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-59°. The Mn(5)-O(13) bond length is 2.09 Å. The Mn(5)-O(2) bond length is 2.15 Å. The Mn(5)-O(5) bond length is 1.96 Å. The Mn(5)-O(8) bond length is 1.91 Å. The Mn(5)-F(10) bond length is 2.35 Å. The Mn(5)-F(6) bond length is 2.02 Å. In the sixth Mn site, Mn(6) is bonded to one O(3), one O(6), one F(3), one F(4), one F(8), and one F(9) atom to form MnO2F4 octahedra that share corners with two equivalent Mn(10)O4F2 octahedra, corners with two equivalent Mn(12)O4F2 octahedra, corners with four equivalent Mn(8)O3F3 octahedra,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(3)O4F2 octahedra, and  an edgeedge with one Mn(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 44-63°. The Mn(6)-O(3) bond length is 2.00 Å. The Mn(6)-O(6) bond length is 2.13 Å. The Mn(6)-F(3) bond length is 2.05 Å. The Mn(6)-F(4) bond length is 2.18 Å. The Mn(6)-F(8) bond length is 2.08 Å. The Mn(6)-F(9) bond length is 2.15 Å. In the seventh Mn site, Mn(7) is bonded to one O(13), one O(14), one O(2), one O(8), one F(2), and one F(6) atom to form MnO4F2 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with two equivalent Mn(1)O3F3 octahedra, corners with two equivalent Mn(4)O4F2 octahedra, corners with four equivalent Mn(5)O4F2 octahedra,  an edgeedge with one Mn(11)O3F3 octahedra, and  an edgeedge with one Mn(12)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 41-59°. The Mn(7)-O(13) bond length is 2.00 Å. The Mn(7)-O(14) bond length is 2.04 Å. The Mn(7)-O(2) bond length is 2.03 Å. The Mn(7)-O(8) bond length is 2.17 Å. The Mn(7)-F(2) bond length is 2.01 Å. The Mn(7)-F(6) bond length is 2.29 Å. In the eighth Mn site, Mn(8) is bonded to one O(10), one O(3), one O(9), one F(3), one F(4), and one F(9) atom to form distorted MnO3F3 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with two equivalent Mn(3)O4F2 octahedra, corners with two equivalent Mn(4)O4F2 octahedra, corners with four equivalent Mn(6)O2F4 octahedra,  an edgeedge with one Mn(10)O4F2 octahedra, and  an edgeedge with one Mn(12)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 36-63°. The Mn(8)-O(10) bond length is 1.99 Å. The Mn(8)-O(3) bond length is 1.93 Å. The Mn(8)-O(9) bond length is 2.09 Å. The Mn(8)-F(3) bond length is 2.15 Å. The Mn(8)-F(4) bond length is 2.27 Å. The Mn(8)-F(9) bond length is 2.14 Å. In the ninth Mn site, Mn(9) is bonded to one O(1), one O(11), one O(12), one O(7), one F(1), and one F(5) atom to form MnO4F2 octahedra that share corners with two equivalent Mn(1)O3F3 octahedra, corners with two equivalent Mn(3)O4F2 octahedra, corners with four equivalent Mn(2)O3F3 octahedra,  an edgeedge with one Mn(11)O3F3 octahedra, and  an edgeedge with one Mn(10)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 46-62°. The Mn(9)-O(1) bond length is 2.02 Å. The Mn(9)-O(11) bond length is 2.11 Å. The Mn(9)-O(12) bond length is 1.95 Å. The Mn(9)-O(7) bond length is 1.95 Å. The Mn(9)-F(1) bond length is 2.14 Å. The Mn(9)-F(5) bond length is 2.11 Å. In the tenth Mn site, Mn(10) is bonded to one O(10), one O(11), one O(4), one O(7), one F(3), and one F(8) atom to form MnO4F2 octahedra that share corners with two equivalent Mn(6)O2F4 octahedra, corners with two equivalent Mn(2)O3F3 octahedra, corners with four equivalent Mn(3)O4F2 octahedra,  an edgeedge with one Mn(8)O3F3 octahedra, and  an edgeedge with one Mn(9)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-59°. The Mn(10)-O(10) bond length is 2.02 Å. The Mn(10)-O(11) bond length is 1.86 Å. The Mn(10)-O(4) bond length is 2.02 Å. The Mn(10)-O(7) bond length is 1.89 Å. The Mn(10)-F(3) bond length is 2.02 Å. The Mn(10)-F(8) bond length is 2.04 Å. In the eleventh Mn site, Mn(11) is bonded to one O(12), one O(13), one O(5), one F(1), one F(2), and one F(7) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(2)O3F3 octahedra, corners with two equivalent Mn(5)O4F2 octahedra, corners with four equivalent Mn(1)O3F3 octahedra,  an edgeedge with one Mn(7)O4F2 octahedra, and  an edgeedge with one Mn(9)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 43-59°. The Mn(11)-O(12) bond length is 2.06 Å. The Mn(11)-O(13) bond length is 1.93 Å. The Mn(11)-O(5) bond length is 1.99 Å. The Mn(11)-F(1) bond length is 2.00 Å. The Mn(11)-F(2) bond length is 2.19 Å. The Mn(11)-F(7) bond length is 2.14 Å. In the twelfth Mn site, Mn(12) is bonded to one O(14), one O(6), one O(8), one O(9), one F(10), and one F(4) atom to form MnO4F2 octahedra that share corners with two equivalent Mn(6)O2F4 octahedra, corners with two equivalent Mn(5)O4F2 octahedra, corners with four equivalent Mn(4)O4F2 octahedra,  an edgeedge with one Mn(8)O3F3 octahedra,  an edgeedge with one Mn(7)O4F2 octahedra, and faces with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 40-58°. The Mn(12)-O(14) bond length is 1.98 Å. The Mn(12)-O(6) bond length is 1.96 Å. The Mn(12)-O(8) bond length is 1.99 Å. The Mn(12)-O(9) bond length is 1.95 Å. The Mn(12)-F(10) bond length is 2.06 Å. The Mn(12)-F(4) bond length is 2.18 Å. There are fourteen 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(9) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mn(4), one Mn(5), and one Mn(7) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(3), one Mn(6), and one Mn(8) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(10), one Mn(2), and one Mn(3) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mn(1), one Mn(11), and one Mn(5) atom. In the sixth O site, O(6) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Mn(12), one Mn(4), and one Mn(6) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Mn(10), one Mn(3), and one Mn(9) atom. In the eighth O site, O(8) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(12), one Mn(5), and one Mn(7) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Mg(1), one Mn(12), one Mn(4), and one Mn(8) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to one Mn(10), one Mn(3), and one Mn(8) atom. In the eleventh O site, O(11) is bonded in a distorted trigonal planar geometry to one Mn(10), one Mn(2), and one Mn(9) atom. In the twelfth O site, O(12) is bonded in a trigonal planar geometry to one Mn(1), one Mn(11), and one Mn(9) atom. In the thirteenth O site, O(13) is bonded in a distorted trigonal planar geometry to one Mn(11), one Mn(5), and one Mn(7) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Mg(1), one Mn(12), one Mn(4), and one Mn(7) atom. There are ten inequivalent F sites. In the first F site, F(1) is bonded in a distorted trigonal planar geometry to one Mn(11), one Mn(2), and one Mn(9) atom. In the second F site, F(2) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(11), and one Mn(7) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Mn(10), one Mn(6), and one Mn(8) atom. In the fourth F site, F(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(12), one Mn(6), and one Mn(8) atom. In the fifth F site, F(5) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(3), and one Mn(9) atom. In the sixth F site, F(6) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(5), and one Mn(7) atom. In the seventh F site, F(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(11), and one Mn(2) atom. In the eighth F site, F(8) is bonded in a 3-coordinate geometry to one Mn(10), one Mn(3), and one Mn(6) atom. In the ninth F site, F(9) is bonded in a distorted trigonal planar geometry to one Mn(4), one Mn(6), and one Mn(8) atom. In the tenth F site, F(10) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(12), one Mn(4), and one Mn(5) atom.