MgMn6O7F5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), 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(2)O3F3 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(4)O4F2 octahedra, edges with two equivalent Mn(5)O4F2 octahedra,  an edgeedge with one Mn(3)O4F trigonal bipyramid, and  a faceface with one Mn(3)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 35-51°. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 5-coordinate geometry to one O(3), one O(6), one O(7), one F(2), and one F(3) atom. In the second Mn site, Mn(2) is bonded to one O(3), one O(4), one O(5), one F(1), one F(3), and one F(4) atom to form distorted MnO3F3 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with two equivalent Mn(6)O2F4 octahedra, corners with two equivalent Mn(5)O4F2 octahedra, corners with four equivalent Mn(4)O4F2 octahedra, and  an edgeedge with one Mn(3)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 35-61°. In the third Mn site, Mn(3) is bonded to one O(1), one O(4), one O(5), one O(6), and one F(2) atom to form distorted MnO4F trigonal bipyramids that share  a cornercorner with one Mn(6)O2F4 octahedra, corners with two equivalent Mn(4)O4F2 octahedra, corners with three equivalent Mn(5)O4F2 octahedra,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(2)O3F3 octahedra, and  a faceface with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 36-61°. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(3), one O(5), one O(7), one F(1), and one F(4) atom to form MnO4F2 octahedra that share corners with four equivalent Mn(2)O3F3 octahedra, corners with two equivalent Mn(3)O4F trigonal bipyramids,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra, and  an edgeedge with one Mn(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(2), one O(4), one O(6), one F(4), and one F(5) atom to form MnO4F2 octahedra that share corners with two equivalent Mn(2)O3F3 octahedra, corners with three equivalent Mn(3)O4F trigonal bipyramids,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(4)O4F2 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 41-61°. In the sixth Mn site, Mn(6) is bonded to one O(2), one O(7), one F(1), one F(2), one F(3), and one F(5) atom to form MnO2F4 octahedra that share corners with two equivalent Mn(2)O3F3 octahedra,  a cornercorner with one Mn(3)O4F trigonal bipyramid,  an edgeedge with one Mg(1)O4F2 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 44-47°. 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 a mixture of corner and edge-sharing OMgMn3 trigonal pyramids. In the second O site, O(2) is bonded in a water-like geometry to one Mn(5) and one Mn(6) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(4) atom. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Mg(1), one Mn(2), one Mn(3), and one Mn(5) atom. In the fifth O site, O(5) is bonded to one Mg(1), one Mn(2), one Mn(3), and one Mn(4) atom to form a mixture of distorted corner and edge-sharing OMgMn3 trigonal pyramids. In the sixth O site, O(6) is bonded to one Mg(1), one Mn(1), one Mn(3), and one Mn(5) atom to form a mixture of distorted corner and edge-sharing OMgMn3 trigonal pyramids. In the seventh O site, O(7) is bonded in a 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 3-coordinate geometry to one Mn(2), one Mn(4), and one Mn(6) atom. In the second F site, F(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(1), one Mn(3), and one Mn(6) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), 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(4), and one Mn(5) atom. In the fifth F site, F(5) is bonded in a distorted T-shaped geometry to one Mg(1), one Mn(5), and one Mn(6) atom.
MgMn6O7F5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), 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(2)O3F3 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(4)O4F2 octahedra, edges with two equivalent Mn(5)O4F2 octahedra,  an edgeedge with one Mn(3)O4F trigonal bipyramid, and  a faceface with one Mn(3)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 35-51°. The Mg(1)-O(1) bond length is 2.01 Å. The Mg(1)-O(4) bond length is 2.13 Å. The Mg(1)-O(5) bond length is 2.05 Å. The Mg(1)-O(6) bond length is 2.08 Å. The Mg(1)-F(2) bond length is 2.17 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 in a 5-coordinate geometry to one O(3), one O(6), one O(7), one F(2), and one F(3) atom. The Mn(1)-O(3) bond length is 2.11 Å. The Mn(1)-O(6) bond length is 2.12 Å. The Mn(1)-O(7) bond length is 2.08 Å. The Mn(1)-F(2) bond length is 2.39 Å. The Mn(1)-F(3) bond length is 2.20 Å. In the second Mn site, Mn(2) is bonded to one O(3), one O(4), one O(5), one F(1), one F(3), and one F(4) atom to form distorted MnO3F3 octahedra that share corners with two equivalent Mg(1)O4F2 octahedra, corners with two equivalent Mn(6)O2F4 octahedra, corners with two equivalent Mn(5)O4F2 octahedra, corners with four equivalent Mn(4)O4F2 octahedra, and  an edgeedge with one Mn(3)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 35-61°. The Mn(2)-O(3) bond length is 1.92 Å. The Mn(2)-O(4) bond length is 1.96 Å. The Mn(2)-O(5) bond length is 2.04 Å. The Mn(2)-F(1) bond length is 2.31 Å. The Mn(2)-F(3) bond length is 2.00 Å. The Mn(2)-F(4) bond length is 2.61 Å. In the third Mn site, Mn(3) is bonded to one O(1), one O(4), one O(5), one O(6), and one F(2) atom to form distorted MnO4F trigonal bipyramids that share  a cornercorner with one Mn(6)O2F4 octahedra, corners with two equivalent Mn(4)O4F2 octahedra, corners with three equivalent Mn(5)O4F2 octahedra,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(2)O3F3 octahedra, and  a faceface with one Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 36-61°. The Mn(3)-O(1) bond length is 2.04 Å. The Mn(3)-O(4) bond length is 2.01 Å. The Mn(3)-O(5) bond length is 1.94 Å. The Mn(3)-O(6) bond length is 1.90 Å. The Mn(3)-F(2) bond length is 2.09 Å. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(3), one O(5), one O(7), one F(1), and one F(4) atom to form MnO4F2 octahedra that share corners with four equivalent Mn(2)O3F3 octahedra, corners with two equivalent Mn(3)O4F trigonal bipyramids,  an edgeedge with one Mg(1)O4F2 octahedra,  an edgeedge with one Mn(6)O2F4 octahedra, and  an edgeedge with one Mn(5)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. The Mn(4)-O(1) bond length is 1.98 Å. The Mn(4)-O(3) bond length is 1.94 Å. The Mn(4)-O(5) bond length is 2.18 Å. The Mn(4)-O(7) bond length is 1.91 Å. The Mn(4)-F(1) bond length is 2.33 Å. The Mn(4)-F(4) bond length is 2.20 Å. In the fifth Mn site, Mn(5) is bonded to one O(1), one O(2), one O(4), one O(6), one F(4), and one F(5) atom to form MnO4F2 octahedra that share corners with two equivalent Mn(2)O3F3 octahedra, corners with three equivalent Mn(3)O4F trigonal bipyramids,  an edgeedge with one Mn(6)O2F4 octahedra,  an edgeedge with one Mn(4)O4F2 octahedra, and edges with two equivalent Mg(1)O4F2 octahedra. The corner-sharing octahedral tilt angles range from 41-61°. The Mn(5)-O(1) bond length is 2.00 Å. The Mn(5)-O(2) bond length is 1.83 Å. The Mn(5)-O(4) bond length is 2.25 Å. The Mn(5)-O(6) bond length is 2.14 Å. The Mn(5)-F(4) bond length is 1.99 Å. The Mn(5)-F(5) bond length is 2.11 Å. In the sixth Mn site, Mn(6) is bonded to one O(2), one O(7), one F(1), one F(2), one F(3), and one F(5) atom to form MnO2F4 octahedra that share corners with two equivalent Mn(2)O3F3 octahedra,  a cornercorner with one Mn(3)O4F trigonal bipyramid,  an edgeedge with one Mg(1)O4F2 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 44-47°. The Mn(6)-O(2) bond length is 1.87 Å. The Mn(6)-O(7) bond length is 1.93 Å. The Mn(6)-F(1) bond length is 2.01 Å. The Mn(6)-F(2) bond length is 2.19 Å. The Mn(6)-F(3) bond length is 2.08 Å. The Mn(6)-F(5) bond length is 2.10 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 a mixture of corner and edge-sharing OMgMn3 trigonal pyramids. In the second O site, O(2) is bonded in a water-like geometry to one Mn(5) and one Mn(6) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(4) atom. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Mg(1), one Mn(2), one Mn(3), and one Mn(5) atom. In the fifth O site, O(5) is bonded to one Mg(1), one Mn(2), one Mn(3), and one Mn(4) atom to form a mixture of distorted corner and edge-sharing OMgMn3 trigonal pyramids. In the sixth O site, O(6) is bonded to one Mg(1), one Mn(1), one Mn(3), and one Mn(5) atom to form a mixture of distorted corner and edge-sharing OMgMn3 trigonal pyramids. In the seventh O site, O(7) is bonded in a 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 3-coordinate geometry to one Mn(2), one Mn(4), and one Mn(6) atom. In the second F site, F(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(1), one Mn(3), and one Mn(6) atom. In the third F site, F(3) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), 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(4), and one Mn(5) atom. In the fifth F site, F(5) is bonded in a distorted T-shaped geometry to one Mg(1), one Mn(5), and one Mn(6) atom.