MgMn6O7F5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(5), one O(6), one O(7), one F(1), and one F(5) atom to form MgO4F2 octahedra that share corners with two equivalent Mn(1)O3F3 octahedra,  a cornercorner with one Mn(5)O4F square pyramid,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(2)O4F2 octahedra,  an edgeedge with one Mn(5)O4F square pyramid, and edges with two equivalent Mn(3)O4F trigonal bipyramids. The corner-sharing octahedral tilt angles range from 45-48°. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(4), one O(7), one F(2), one F(4), and one F(5) atom to form distorted MnO3F3 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with three equivalent Mn(6)O2F4 octahedra, corners with three equivalent Mn(2)O4F2 octahedra,  a cornercorner with one Mn(3)O4F trigonal bipyramid, and  an edgeedge with one Mn(5)O4F square pyramid. The corner-sharing octahedral tilt angles range from 30-70°. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(5), one O(7), one F(2), and one F(3) atom to form MnO4F2 octahedra that share corners with three equivalent Mn(1)O3F3 octahedra, corners with three equivalent Mn(5)O4F square pyramids,  a cornercorner with one Mn(3)O4F trigonal bipyramid,  an edgeedge with one Mg(1)O4F2 octahedra, and  an edgeedge with one Mn(6)O2F4 octahedra. The corner-sharing octahedral tilt angles range from 30-58°. In the third Mn site, Mn(3) is bonded to one O(2), one O(4), one O(5), one O(6), and one F(1) atom to form distorted MnO4F trigonal bipyramids that share  a cornercorner with one Mn(1)O3F3 octahedra,  a cornercorner with one Mn(2)O4F2 octahedra, corners with two equivalent Mn(5)O4F square pyramids,  an edgeedge with one Mn(6)O2F4 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 50-71°. In the fourth Mn site, Mn(4) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(6), one F(4), and one F(5) atom. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(2), one O(6), one O(7), and one F(3) atom to form MnO4F square pyramids that share  a cornercorner with one Mg(1)O4F2 octahedra,  a cornercorner with one Mn(6)O2F4 octahedra, corners with three equivalent Mn(2)O4F2 octahedra, corners with two equivalent Mn(3)O4F trigonal bipyramids,  an edgeedge with one Mg(1)O4F2 octahedra, and  an edgeedge with one Mn(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 46-57°. In the sixth Mn site, Mn(6) is bonded to one O(3), one O(4), one F(1), one F(3), one F(4), and one F(5) atom to form MnO2F4 octahedra that share corners with three equivalent Mn(1)O3F3 octahedra,  a cornercorner with one Mn(5)O4F square pyramid,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(2)O4F2 octahedra, and  an edgeedge with one Mn(3)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 53-70°. There are seven 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 OMgMn3 trigonal pyramids that share corners with two equivalent O(6)MgMn3 trigonal pyramids, corners with two equivalent O(7)MgMn3 trigonal pyramids,  an edgeedge with one F(5)MgMn3 tetrahedra, and  an edgeedge with one O(6)MgMn3 trigonal pyramid. In the third O site, O(3) is bonded in a 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 trigonal planar geometry to one Mn(1), one Mn(3), and one Mn(6) 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 to one Mg(1), one Mn(3), one Mn(4), and one Mn(5) atom to form distorted OMgMn3 trigonal pyramids that share corners with two equivalent F(5)MgMn3 tetrahedra, corners with two equivalent O(2)MgMn3 trigonal pyramids,  an edgeedge with one O(2)MgMn3 trigonal pyramid, and  an edgeedge with one O(7)MgMn3 trigonal pyramid. In the seventh O site, O(7) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Mn(5) atom to form distorted OMgMn3 trigonal pyramids that share corners with two equivalent F(5)MgMn3 tetrahedra, corners with two equivalent O(2)MgMn3 trigonal pyramids, and  an edgeedge with one O(6)MgMn3 trigonal pyramid. There are five inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(3), and one Mn(6) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Mn(1) and one Mn(2) atom. 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 trigonal planar geometry to one Mn(1), one Mn(4), and one Mn(6) atom. In the fifth F site, F(5) is bonded to one Mg(1), one Mn(1), one Mn(4), and one Mn(6) atom to form distorted FMgMn3 tetrahedra that share corners with two equivalent O(6)MgMn3 trigonal pyramids, corners with two equivalent O(7)MgMn3 trigonal pyramids, and  an edgeedge with one O(2)MgMn3 trigonal pyramid.
MgMn6O7F5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(5), one O(6), one O(7), one F(1), and one F(5) atom to form MgO4F2 octahedra that share corners with two equivalent Mn(1)O3F3 octahedra,  a cornercorner with one Mn(5)O4F square pyramid,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(2)O4F2 octahedra,  an edgeedge with one Mn(5)O4F square pyramid, and edges with two equivalent Mn(3)O4F trigonal bipyramids. The corner-sharing octahedral tilt angles range from 45-48°. The Mg(1)-O(2) bond length is 2.02 Å. The Mg(1)-O(5) bond length is 1.99 Å. The Mg(1)-O(6) bond length is 2.12 Å. The Mg(1)-O(7) bond length is 2.11 Å. The Mg(1)-F(1) bond length is 2.02 Å. The Mg(1)-F(5) bond length is 2.15 Å. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(4), one O(7), one F(2), one F(4), and one F(5) atom to form distorted MnO3F3 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with three equivalent Mn(6)O2F4 octahedra, corners with three equivalent Mn(2)O4F2 octahedra,  a cornercorner with one Mn(3)O4F trigonal bipyramid, and  an edgeedge with one Mn(5)O4F square pyramid. The corner-sharing octahedral tilt angles range from 30-70°. The Mn(1)-O(1) bond length is 1.93 Å. The Mn(1)-O(4) bond length is 1.96 Å. The Mn(1)-O(7) bond length is 2.17 Å. The Mn(1)-F(2) bond length is 2.01 Å. The Mn(1)-F(4) bond length is 2.08 Å. The Mn(1)-F(5) bond length is 2.43 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(3), one O(5), one O(7), one F(2), and one F(3) atom to form MnO4F2 octahedra that share corners with three equivalent Mn(1)O3F3 octahedra, corners with three equivalent Mn(5)O4F square pyramids,  a cornercorner with one Mn(3)O4F trigonal bipyramid,  an edgeedge with one Mg(1)O4F2 octahedra, and  an edgeedge with one Mn(6)O2F4 octahedra. The corner-sharing octahedral tilt angles range from 30-58°. 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(5) bond length is 1.93 Å. The Mn(2)-O(7) bond length is 2.03 Å. The Mn(2)-F(2) bond length is 2.25 Å. The Mn(2)-F(3) bond length is 2.27 Å. In the third Mn site, Mn(3) is bonded to one O(2), one O(4), one O(5), one O(6), and one F(1) atom to form distorted MnO4F trigonal bipyramids that share  a cornercorner with one Mn(1)O3F3 octahedra,  a cornercorner with one Mn(2)O4F2 octahedra, corners with two equivalent Mn(5)O4F square pyramids,  an edgeedge with one Mn(6)O2F4 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 50-71°. The Mn(3)-O(2) bond length is 2.00 Å. The Mn(3)-O(4) bond length is 2.13 Å. The Mn(3)-O(5) bond length is 1.85 Å. The Mn(3)-O(6) bond length is 2.00 Å. The Mn(3)-F(1) bond length is 2.05 Å. In the fourth Mn site, Mn(4) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(6), one F(4), and one F(5) atom. The Mn(4)-O(2) bond length is 2.18 Å. The Mn(4)-O(3) bond length is 1.98 Å. The Mn(4)-O(6) bond length is 2.05 Å. The Mn(4)-F(4) bond length is 2.18 Å. The Mn(4)-F(5) bond length is 2.19 Å. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(2), one O(6), one O(7), and one F(3) atom to form MnO4F square pyramids that share  a cornercorner with one Mg(1)O4F2 octahedra,  a cornercorner with one Mn(6)O2F4 octahedra, corners with three equivalent Mn(2)O4F2 octahedra, corners with two equivalent Mn(3)O4F trigonal bipyramids,  an edgeedge with one Mg(1)O4F2 octahedra, and  an edgeedge with one Mn(1)O3F3 octahedra. The corner-sharing octahedral tilt angles range from 46-57°. The Mn(5)-O(1) bond length is 1.96 Å. The Mn(5)-O(2) bond length is 1.98 Å. The Mn(5)-O(6) bond length is 2.00 Å. The Mn(5)-O(7) bond length is 1.96 Å. The Mn(5)-F(3) bond length is 2.08 Å. In the sixth Mn site, Mn(6) is bonded to one O(3), one O(4), one F(1), one F(3), one F(4), and one F(5) atom to form MnO2F4 octahedra that share corners with three equivalent Mn(1)O3F3 octahedra,  a cornercorner with one Mn(5)O4F square pyramid,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(2)O4F2 octahedra, and  an edgeedge with one Mn(3)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 53-70°. The Mn(6)-O(3) bond length is 1.92 Å. The Mn(6)-O(4) bond length is 1.94 Å. The Mn(6)-F(1) bond length is 2.23 Å. The Mn(6)-F(3) bond length is 2.00 Å. The Mn(6)-F(4) bond length is 2.05 Å. The Mn(6)-F(5) bond length is 2.12 Å. There are seven 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 OMgMn3 trigonal pyramids that share corners with two equivalent O(6)MgMn3 trigonal pyramids, corners with two equivalent O(7)MgMn3 trigonal pyramids,  an edgeedge with one F(5)MgMn3 tetrahedra, and  an edgeedge with one O(6)MgMn3 trigonal pyramid. In the third O site, O(3) is bonded in a 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 trigonal planar geometry to one Mn(1), one Mn(3), and one Mn(6) 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 to one Mg(1), one Mn(3), one Mn(4), and one Mn(5) atom to form distorted OMgMn3 trigonal pyramids that share corners with two equivalent F(5)MgMn3 tetrahedra, corners with two equivalent O(2)MgMn3 trigonal pyramids,  an edgeedge with one O(2)MgMn3 trigonal pyramid, and  an edgeedge with one O(7)MgMn3 trigonal pyramid. In the seventh O site, O(7) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Mn(5) atom to form distorted OMgMn3 trigonal pyramids that share corners with two equivalent F(5)MgMn3 tetrahedra, corners with two equivalent O(2)MgMn3 trigonal pyramids, and  an edgeedge with one O(6)MgMn3 trigonal pyramid. There are five inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(3), and one Mn(6) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Mn(1) and one Mn(2) atom. 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 trigonal planar geometry to one Mn(1), one Mn(4), and one Mn(6) atom. In the fifth F site, F(5) is bonded to one Mg(1), one Mn(1), one Mn(4), and one Mn(6) atom to form distorted FMgMn3 tetrahedra that share corners with two equivalent O(6)MgMn3 trigonal pyramids, corners with two equivalent O(7)MgMn3 trigonal pyramids, and  an edgeedge with one O(2)MgMn3 trigonal pyramid.