MgMn6O7F5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(4), one O(5), one O(6), one F(2), and one F(5) atom to form MgO4F2 octahedra that share corners with two equivalent Mn(5)O4F2 octahedra, corners with two equivalent Mn(6)O4F2 octahedra, edges with two equivalent Mn(1)O3F3 octahedra, edges with two equivalent Mn(3)O3F3 octahedra, and faces with two equivalent Mn(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 38-46°. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(5), one O(7), one F(1), one F(2), and one F(5) atom to form MnO3F3 octahedra that share corners with four equivalent Mn(4)O4F2 octahedra, corners with four equivalent Mn(5)O4F2 octahedra,  an edgeedge with one Mn(2)O3F3 octahedra,  an edgeedge with one Mn(3)O3F3 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-64°. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(7), one F(1), one F(3), and one F(4) atom to form MnO3F3 octahedra that share corners with four equivalent Mn(5)O4F2 octahedra, corners with four equivalent Mn(6)O4F2 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra, and  an edgeedge with one Mn(3)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 44-57°. In the third Mn site, Mn(3) is bonded to one O(1), one O(4), one O(6), one F(2), one F(4), and one F(5) atom to form MnO3F3 octahedra that share corners with four equivalent Mn(4)O4F2 octahedra, corners with four equivalent Mn(6)O4F2 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra,  an edgeedge with one Mn(2)O3F3 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-64°. In the fourth Mn site, Mn(4) is bonded to one O(2), one O(4), one O(5), one O(6), one F(2), and one F(5) atom to form distorted MnO4F2 octahedra that share corners with four equivalent Mn(1)O3F3 octahedra, corners with four equivalent Mn(3)O3F3 octahedra,  an edgeedge with one Mn(5)O4F2 octahedra,  an edgeedge with one Mn(6)O4F2 octahedra, and faces with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-57°. In the fifth Mn site, Mn(5) is bonded to one O(2), one O(3), one O(5), one O(7), one F(1), and one F(3) atom to form MnO4F2 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with four equivalent Mn(1)O3F3 octahedra, corners with four equivalent Mn(2)O3F3 octahedra,  an edgeedge with one Mn(4)O4F2 octahedra, and  an edgeedge with one Mn(6)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 38-64°. In the sixth Mn site, Mn(6) is bonded to one O(1), one O(3), one O(4), one O(6), one F(3), and one F(4) atom to form MnO4F2 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with four equivalent Mn(2)O3F3 octahedra, corners with four equivalent Mn(3)O3F3 octahedra,  an edgeedge with one Mn(4)O4F2 octahedra, and  an edgeedge with one Mn(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 38-64°. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(3), and one Mn(6) atom. In the second O site, O(2) is bonded to one Mg(1), one Mn(1), one Mn(4), and one Mn(5) atom to form distorted OMgMn3 trigonal pyramids that share  a cornercorner with one F(2)MgMn3 trigonal pyramid,  a cornercorner with one F(5)MgMn3 trigonal pyramid,  an edgeedge with one F(2)MgMn3 trigonal pyramid, and  an edgeedge with one F(5)MgMn3 trigonal pyramid. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(2), one Mn(5), and one Mn(6) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(3), one Mn(4), and one Mn(6) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(1), one Mn(4), and one Mn(5) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(3), one Mn(4), and one Mn(6) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(5) atom. There are five inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one Mn(5) atom. In the second F site, F(2) is bonded to one Mg(1), one Mn(1), one Mn(3), and one Mn(4) atom to form distorted FMgMn3 trigonal pyramids that share  a cornercorner with one O(2)MgMn3 trigonal pyramid, corners with two equivalent F(5)MgMn3 trigonal pyramids,  an edgeedge with one O(2)MgMn3 trigonal pyramid, and  an edgeedge with one F(5)MgMn3 trigonal pyramid. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(5), and one Mn(6) atom. In the fourth F site, F(4) is bonded in a 3-coordinate geometry to one Mn(2), one Mn(3), and one Mn(6) atom. In the fifth F site, F(5) is bonded to one Mg(1), one Mn(1), one Mn(3), and one Mn(4) atom to form distorted FMgMn3 trigonal pyramids that share  a cornercorner with one O(2)MgMn3 trigonal pyramid, corners with two equivalent F(2)MgMn3 trigonal pyramids,  an edgeedge with one O(2)MgMn3 trigonal pyramid, and  an edgeedge with one F(2)MgMn3 trigonal pyramid.
MgMn6O7F5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(4), one O(5), one O(6), one F(2), and one F(5) atom to form MgO4F2 octahedra that share corners with two equivalent Mn(5)O4F2 octahedra, corners with two equivalent Mn(6)O4F2 octahedra, edges with two equivalent Mn(1)O3F3 octahedra, edges with two equivalent Mn(3)O3F3 octahedra, and faces with two equivalent Mn(4)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 38-46°. The Mg(1)-O(2) bond length is 2.04 Å. The Mg(1)-O(4) bond length is 2.13 Å. The Mg(1)-O(5) bond length is 2.11 Å. The Mg(1)-O(6) bond length is 2.07 Å. The Mg(1)-F(2) bond length is 1.94 Å. The Mg(1)-F(5) bond length is 1.94 Å. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(5), one O(7), one F(1), one F(2), and one F(5) atom to form MnO3F3 octahedra that share corners with four equivalent Mn(4)O4F2 octahedra, corners with four equivalent Mn(5)O4F2 octahedra,  an edgeedge with one Mn(2)O3F3 octahedra,  an edgeedge with one Mn(3)O3F3 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-64°. The Mn(1)-O(2) bond length is 2.05 Å. The Mn(1)-O(5) bond length is 2.03 Å. The Mn(1)-O(7) bond length is 1.86 Å. The Mn(1)-F(1) bond length is 2.07 Å. The Mn(1)-F(2) bond length is 2.09 Å. The Mn(1)-F(5) bond length is 2.32 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(7), one F(1), one F(3), and one F(4) atom to form MnO3F3 octahedra that share corners with four equivalent Mn(5)O4F2 octahedra, corners with four equivalent Mn(6)O4F2 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra, and  an edgeedge with one Mn(3)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 44-57°. The Mn(2)-O(1) bond length is 1.97 Å. The Mn(2)-O(3) bond length is 1.94 Å. The Mn(2)-O(7) bond length is 1.96 Å. The Mn(2)-F(1) bond length is 2.18 Å. The Mn(2)-F(3) bond length is 2.08 Å. The Mn(2)-F(4) bond length is 2.22 Å. In the third Mn site, Mn(3) is bonded to one O(1), one O(4), one O(6), one F(2), one F(4), and one F(5) atom to form MnO3F3 octahedra that share corners with four equivalent Mn(4)O4F2 octahedra, corners with four equivalent Mn(6)O4F2 octahedra,  an edgeedge with one Mn(1)O3F3 octahedra,  an edgeedge with one Mn(2)O3F3 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-64°. The Mn(3)-O(1) bond length is 1.84 Å. The Mn(3)-O(4) bond length is 2.03 Å. The Mn(3)-O(6) bond length is 2.07 Å. The Mn(3)-F(2) bond length is 2.30 Å. The Mn(3)-F(4) bond length is 2.06 Å. The Mn(3)-F(5) bond length is 2.06 Å. In the fourth Mn site, Mn(4) is bonded to one O(2), one O(4), one O(5), one O(6), one F(2), and one F(5) atom to form distorted MnO4F2 octahedra that share corners with four equivalent Mn(1)O3F3 octahedra, corners with four equivalent Mn(3)O3F3 octahedra,  an edgeedge with one Mn(5)O4F2 octahedra,  an edgeedge with one Mn(6)O4F2 octahedra, and faces with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 42-57°. The Mn(4)-O(2) bond length is 1.93 Å. The Mn(4)-O(4) bond length is 1.95 Å. The Mn(4)-O(5) bond length is 1.93 Å. The Mn(4)-O(6) bond length is 1.96 Å. The Mn(4)-F(2) bond length is 2.38 Å. The Mn(4)-F(5) bond length is 2.35 Å. In the fifth Mn site, Mn(5) is bonded to one O(2), one O(3), one O(5), one O(7), one F(1), and one F(3) atom to form MnO4F2 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with four equivalent Mn(1)O3F3 octahedra, corners with four equivalent Mn(2)O3F3 octahedra,  an edgeedge with one Mn(4)O4F2 octahedra, and  an edgeedge with one Mn(6)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 38-64°. The Mn(5)-O(2) bond length is 2.13 Å. The Mn(5)-O(3) bond length is 2.01 Å. The Mn(5)-O(5) bond length is 2.18 Å. The Mn(5)-O(7) bond length is 2.28 Å. The Mn(5)-F(1) bond length is 2.39 Å. The Mn(5)-F(3) bond length is 2.18 Å. In the sixth Mn site, Mn(6) is bonded to one O(1), one O(3), one O(4), one O(6), one F(3), and one F(4) atom to form MnO4F2 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with four equivalent Mn(2)O3F3 octahedra, corners with four equivalent Mn(3)O3F3 octahedra,  an edgeedge with one Mn(4)O4F2 octahedra, and  an edgeedge with one Mn(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 38-64°. The Mn(6)-O(1) bond length is 2.29 Å. The Mn(6)-O(3) bond length is 1.93 Å. The Mn(6)-O(4) bond length is 2.10 Å. The Mn(6)-O(6) bond length is 2.06 Å. The Mn(6)-F(3) bond length is 2.13 Å. The Mn(6)-F(4) bond length is 2.35 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(3), and one Mn(6) atom. In the second O site, O(2) is bonded to one Mg(1), one Mn(1), one Mn(4), and one Mn(5) atom to form distorted OMgMn3 trigonal pyramids that share  a cornercorner with one F(2)MgMn3 trigonal pyramid,  a cornercorner with one F(5)MgMn3 trigonal pyramid,  an edgeedge with one F(2)MgMn3 trigonal pyramid, and  an edgeedge with one F(5)MgMn3 trigonal pyramid. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(2), one Mn(5), and one Mn(6) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(3), one Mn(4), and one Mn(6) atom. In the fifth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(1), one Mn(4), and one Mn(5) atom. In the sixth O site, O(6) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(3), one Mn(4), and one Mn(6) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(5) atom. There are five inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one Mn(5) atom. In the second F site, F(2) is bonded to one Mg(1), one Mn(1), one Mn(3), and one Mn(4) atom to form distorted FMgMn3 trigonal pyramids that share  a cornercorner with one O(2)MgMn3 trigonal pyramid, corners with two equivalent F(5)MgMn3 trigonal pyramids,  an edgeedge with one O(2)MgMn3 trigonal pyramid, and  an edgeedge with one F(5)MgMn3 trigonal pyramid. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Mn(2), one Mn(5), and one Mn(6) atom. In the fourth F site, F(4) is bonded in a 3-coordinate geometry to one Mn(2), one Mn(3), and one Mn(6) atom. In the fifth F site, F(5) is bonded to one Mg(1), one Mn(1), one Mn(3), and one Mn(4) atom to form distorted FMgMn3 trigonal pyramids that share  a cornercorner with one O(2)MgMn3 trigonal pyramid, corners with two equivalent F(2)MgMn3 trigonal pyramids,  an edgeedge with one O(2)MgMn3 trigonal pyramid, and  an edgeedge with one F(2)MgMn3 trigonal pyramid.