MgMn6O7F5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(5), one F(2), one F(4), and one F(5) atom to form MgO3F3 octahedra that share corners with two equivalent Mn(6)O3F3 octahedra,  a cornercorner with one Mn(4)O4F trigonal bipyramid, edges with two equivalent Mn(2)O3F3 octahedra, edges with two equivalent Mn(3)O3F3 octahedra, and  an edgeedge with one Mn(4)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 49-50°. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), one O(6), one O(7), one F(1), and one F(3) atom to form MnO4F2 octahedra that share corners with four equivalent Mn(6)O3F3 octahedra, corners with two equivalent Mn(4)O4F trigonal bipyramids,  an edgeedge with one Mn(2)O3F3 octahedra, and  an edgeedge with one Mn(3)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. In the second Mn site, Mn(2) is bonded to one O(2), one O(4), one O(5), one F(2), one F(3), and one F(4) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(6)O3F3 octahedra, corners with three equivalent Mn(4)O4F trigonal bipyramids,  an edgeedge with one Mn(3)O3F3 octahedra,  an edgeedge with one Mn(1)O4F2 octahedra, and edges with two equivalent Mg(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 44-59°. In the third Mn site, Mn(3) is bonded to one O(1), one O(5), one O(6), one F(1), one F(2), and one F(5) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(6)O3F3 octahedra,  a cornercorner with one Mn(4)O4F trigonal bipyramid,  an edgeedge with one Mn(2)O3F3 octahedra,  an edgeedge with one Mn(1)O4F2 octahedra, and edges with two equivalent Mg(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 44-57°. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(2), one O(4), one O(7), and one F(4) atom to form distorted MnO4F trigonal bipyramids that share  a cornercorner with one Mg(1)O3F3 octahedra,  a cornercorner with one Mn(3)O3F3 octahedra, corners with two equivalent Mn(1)O4F2 octahedra, corners with three equivalent Mn(2)O3F3 octahedra,  an edgeedge with one Mg(1)O3F3 octahedra, and  an edgeedge with one Mn(6)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 45-61°. In the fifth Mn site, Mn(5) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(6), one F(4), and one F(5) atom. In the sixth Mn site, Mn(6) is bonded to one O(2), one O(3), one O(7), one F(1), one F(3), and one F(5) atom to form MnO3F3 octahedra that share corners with two equivalent Mg(1)O3F3 octahedra, corners with two equivalent Mn(2)O3F3 octahedra, corners with two equivalent Mn(3)O3F3 octahedra, corners with four equivalent Mn(1)O4F2 octahedra, and  an edgeedge with one Mn(4)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 44-59°. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(3), one Mn(4), and one Mn(5) atom to form OMgMn3 tetrahedra that share corners with three equivalent F(5)MgMn3 trigonal pyramids and  an edgeedge with one O(2)MgMn3 trigonal pyramid. In the second O site, O(2) is bonded to one Mg(1), one Mn(2), one Mn(4), and one Mn(6) atom to form distorted OMgMn3 trigonal pyramids that share corners with two equivalent F(5)MgMn3 trigonal pyramids and  an edgeedge with one O(1)MgMn3 tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(1), one Mn(5), and one Mn(6) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(4) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Mn(1), one Mn(3), and one Mn(5) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(4), and one Mn(6) atom. There are five inequivalent F sites. In the first F site, F(1) is bonded in a distorted T-shaped geometry to one Mn(1), one Mn(3), and one Mn(6) atom. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one Mn(6) atom. In the fourth F site, F(4) is bonded in a 4-coordinate geometry to one Mg(1), one Mn(2), one Mn(4), and one Mn(5) atom. In the fifth F site, F(5) is bonded to one Mg(1), one Mn(3), one Mn(5), and one Mn(6) atom to form distorted FMgMn3 trigonal pyramids that share corners with three equivalent O(1)MgMn3 tetrahedra and corners with two equivalent O(2)MgMn3 trigonal pyramids.
MgMn6O7F5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(5), one F(2), one F(4), and one F(5) atom to form MgO3F3 octahedra that share corners with two equivalent Mn(6)O3F3 octahedra,  a cornercorner with one Mn(4)O4F trigonal bipyramid, edges with two equivalent Mn(2)O3F3 octahedra, edges with two equivalent Mn(3)O3F3 octahedra, and  an edgeedge with one Mn(4)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 49-50°. The Mg(1)-O(1) bond length is 2.07 Å. The Mg(1)-O(2) bond length is 2.17 Å. The Mg(1)-O(5) bond length is 1.98 Å. The Mg(1)-F(2) bond length is 1.97 Å. The Mg(1)-F(4) bond length is 2.00 Å. The Mg(1)-F(5) bond length is 2.13 Å. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(4), one O(6), one O(7), one F(1), and one F(3) atom to form MnO4F2 octahedra that share corners with four equivalent Mn(6)O3F3 octahedra, corners with two equivalent Mn(4)O4F trigonal bipyramids,  an edgeedge with one Mn(2)O3F3 octahedra, and  an edgeedge with one Mn(3)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. The Mn(1)-O(3) bond length is 2.01 Å. The Mn(1)-O(4) bond length is 1.95 Å. The Mn(1)-O(6) bond length is 1.94 Å. The Mn(1)-O(7) bond length is 2.06 Å. The Mn(1)-F(1) bond length is 2.25 Å. The Mn(1)-F(3) bond length is 2.26 Å. In the second Mn site, Mn(2) is bonded to one O(2), one O(4), one O(5), one F(2), one F(3), and one F(4) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(6)O3F3 octahedra, corners with three equivalent Mn(4)O4F trigonal bipyramids,  an edgeedge with one Mn(3)O3F3 octahedra,  an edgeedge with one Mn(1)O4F2 octahedra, and edges with two equivalent Mg(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 44-59°. The Mn(2)-O(2) bond length is 2.07 Å. The Mn(2)-O(4) bond length is 1.89 Å. The Mn(2)-O(5) bond length is 1.89 Å. The Mn(2)-F(2) bond length is 2.06 Å. The Mn(2)-F(3) bond length is 1.98 Å. The Mn(2)-F(4) bond length is 2.23 Å. In the third Mn site, Mn(3) is bonded to one O(1), one O(5), one O(6), one F(1), one F(2), and one F(5) atom to form MnO3F3 octahedra that share corners with two equivalent Mn(6)O3F3 octahedra,  a cornercorner with one Mn(4)O4F trigonal bipyramid,  an edgeedge with one Mn(2)O3F3 octahedra,  an edgeedge with one Mn(1)O4F2 octahedra, and edges with two equivalent Mg(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 44-57°. The Mn(3)-O(1) bond length is 2.00 Å. The Mn(3)-O(5) bond length is 1.93 Å. The Mn(3)-O(6) bond length is 1.90 Å. The Mn(3)-F(1) bond length is 2.11 Å. The Mn(3)-F(2) bond length is 2.19 Å. The Mn(3)-F(5) bond length is 2.18 Å. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(2), one O(4), one O(7), and one F(4) atom to form distorted MnO4F trigonal bipyramids that share  a cornercorner with one Mg(1)O3F3 octahedra,  a cornercorner with one Mn(3)O3F3 octahedra, corners with two equivalent Mn(1)O4F2 octahedra, corners with three equivalent Mn(2)O3F3 octahedra,  an edgeedge with one Mg(1)O3F3 octahedra, and  an edgeedge with one Mn(6)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 45-61°. The Mn(4)-O(1) bond length is 2.04 Å. The Mn(4)-O(2) bond length is 1.95 Å. The Mn(4)-O(4) bond length is 2.10 Å. The Mn(4)-O(7) bond length is 1.98 Å. The Mn(4)-F(4) bond length is 2.07 Å. In the fifth Mn site, Mn(5) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(6), one F(4), and one F(5) atom. The Mn(5)-O(1) bond length is 2.05 Å. The Mn(5)-O(3) bond length is 2.00 Å. The Mn(5)-O(6) bond length is 2.00 Å. The Mn(5)-F(4) bond length is 2.61 Å. The Mn(5)-F(5) bond length is 2.51 Å. In the sixth Mn site, Mn(6) is bonded to one O(2), one O(3), one O(7), one F(1), one F(3), and one F(5) atom to form MnO3F3 octahedra that share corners with two equivalent Mg(1)O3F3 octahedra, corners with two equivalent Mn(2)O3F3 octahedra, corners with two equivalent Mn(3)O3F3 octahedra, corners with four equivalent Mn(1)O4F2 octahedra, and  an edgeedge with one Mn(4)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 44-59°. The Mn(6)-O(2) bond length is 1.96 Å. The Mn(6)-O(3) bond length is 1.93 Å. The Mn(6)-O(7) bond length is 1.99 Å. The Mn(6)-F(1) bond length is 2.20 Å. The Mn(6)-F(3) bond length is 2.36 Å. The Mn(6)-F(5) bond length is 2.16 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(3), one Mn(4), and one Mn(5) atom to form OMgMn3 tetrahedra that share corners with three equivalent F(5)MgMn3 trigonal pyramids and  an edgeedge with one O(2)MgMn3 trigonal pyramid. In the second O site, O(2) is bonded to one Mg(1), one Mn(2), one Mn(4), and one Mn(6) atom to form distorted OMgMn3 trigonal pyramids that share corners with two equivalent F(5)MgMn3 trigonal pyramids and  an edgeedge with one O(1)MgMn3 tetrahedra. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(1), one Mn(5), and one Mn(6) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(4) atom. In the fifth O site, O(5) is bonded in a trigonal non-coplanar geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Mn(1), one Mn(3), and one Mn(5) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(4), and one Mn(6) atom. There are five inequivalent F sites. In the first F site, F(1) is bonded in a distorted T-shaped geometry to one Mn(1), one Mn(3), and one Mn(6) atom. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the third F site, F(3) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one Mn(6) atom. In the fourth F site, F(4) is bonded in a 4-coordinate geometry to one Mg(1), one Mn(2), one Mn(4), and one Mn(5) atom. In the fifth F site, F(5) is bonded to one Mg(1), one Mn(3), one Mn(5), and one Mn(6) atom to form distorted FMgMn3 trigonal pyramids that share corners with three equivalent O(1)MgMn3 tetrahedra and corners with two equivalent O(2)MgMn3 trigonal pyramids.