MgMn6(O5F)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(6), one O(7), one O(9), and one F(2) atom to form MgO5F octahedra that share corners with two equivalent Mn(6)O5 square pyramids,  a cornercorner with one Mn(4)O4F trigonal bipyramid, edges with two equivalent Mn(2)O4F2 octahedra, edges with two equivalent Mn(3)O6 octahedra, and  an edgeedge with one Mn(4)O4F trigonal bipyramid. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(10), one O(3), one O(4), one O(5), one O(8), and one F(1) atom to form MnO5F octahedra that share corners with three equivalent Mn(6)O5 square pyramids, corners with two equivalent Mn(4)O4F trigonal bipyramids,  an edgeedge with one Mn(2)O4F2 octahedra, and  an edgeedge with one Mn(3)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(2), one O(5), one O(6), one O(7), one F(1), and one F(2) atom to form MnO4F2 octahedra that share  a cornercorner with one Mn(6)O5 square pyramid, corners with three equivalent Mn(4)O4F trigonal bipyramids,  an edgeedge with one Mn(1)O5F octahedra,  an edgeedge with one Mn(3)O6 octahedra, and edges with two equivalent Mg(1)O5F octahedra. In the third Mn site, Mn(3) is bonded to one O(1), one O(4), one O(6), one O(7), one O(8), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent Mn(6)O5 square pyramids,  a cornercorner with one Mn(4)O4F trigonal bipyramid,  an edgeedge with one Mn(2)O4F2 octahedra,  an edgeedge with one Mn(1)O5F octahedra, and edges with two equivalent Mg(1)O5F octahedra. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(10), one O(2), one O(5), and one F(2) atom to form distorted MnO4F trigonal bipyramids that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mn(3)O6 octahedra, corners with two equivalent Mn(1)O5F octahedra, corners with three equivalent Mn(2)O4F2 octahedra,  an edgeedge with one Mg(1)O5F octahedra, and  an edgeedge with one Mn(6)O5 square pyramid. The corner-sharing octahedral tilt angles range from 45-64°. In the fifth Mn site, Mn(5) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(8), one O(9), and one F(2) atom. In the sixth Mn site, Mn(6) is bonded to one O(10), one O(2), one O(3), one O(4), and one O(9) atom to form distorted MnO5 square pyramids that share  a cornercorner with one Mn(2)O4F2 octahedra, corners with two equivalent Mg(1)O5F octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(1)O5F octahedra, and  an edgeedge with one Mn(4)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 42-59°. There are ten 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 trigonal pyramids that share  a cornercorner with one F(2)MgMn3 trigonal pyramid, corners with three equivalent O(9)MgMn3 trigonal pyramids, and  an edgeedge with one F(2)MgMn3 trigonal pyramid. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Mg(1), one Mn(2), one Mn(4), 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(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(3), and one Mn(6) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(3), and one Mn(5) atom. In the ninth O site, O(9) is bonded to one Mg(1), one Mn(3), one Mn(5), and one Mn(6) atom to form distorted OMgMn3 trigonal pyramids that share corners with three equivalent O(1)MgMn3 trigonal pyramids and  an edgeedge with one F(2)MgMn3 trigonal pyramid. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(4), and one Mn(6) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted L-shaped geometry to one Mn(1) and one Mn(2) atom. In the second F site, F(2) is bonded to one Mg(1), one Mn(2), one Mn(4), and one Mn(5) atom to form distorted FMgMn3 trigonal pyramids that share  a cornercorner with one O(1)MgMn3 trigonal pyramid,  an edgeedge with one O(1)MgMn3 trigonal pyramid, and  an edgeedge with one O(9)MgMn3 trigonal pyramid.
MgMn6(O5F)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(6), one O(7), one O(9), and one F(2) atom to form MgO5F octahedra that share corners with two equivalent Mn(6)O5 square pyramids,  a cornercorner with one Mn(4)O4F trigonal bipyramid, edges with two equivalent Mn(2)O4F2 octahedra, edges with two equivalent Mn(3)O6 octahedra, and  an edgeedge with one Mn(4)O4F trigonal bipyramid. The Mg(1)-O(1) bond length is 2.08 Å. The Mg(1)-O(2) bond length is 2.21 Å. The Mg(1)-O(6) bond length is 2.00 Å. The Mg(1)-O(7) bond length is 1.98 Å. The Mg(1)-O(9) bond length is 2.12 Å. The Mg(1)-F(2) bond length is 2.08 Å. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(10), one O(3), one O(4), one O(5), one O(8), and one F(1) atom to form MnO5F octahedra that share corners with three equivalent Mn(6)O5 square pyramids, corners with two equivalent Mn(4)O4F trigonal bipyramids,  an edgeedge with one Mn(2)O4F2 octahedra, and  an edgeedge with one Mn(3)O6 octahedra. The Mn(1)-O(10) bond length is 1.95 Å. The Mn(1)-O(3) bond length is 2.00 Å. The Mn(1)-O(4) bond length is 1.90 Å. The Mn(1)-O(5) bond length is 1.92 Å. The Mn(1)-O(8) bond length is 1.92 Å. The Mn(1)-F(1) bond length is 2.07 Å. In the second Mn site, Mn(2) is bonded to one O(2), one O(5), one O(6), one O(7), one F(1), and one F(2) atom to form MnO4F2 octahedra that share  a cornercorner with one Mn(6)O5 square pyramid, corners with three equivalent Mn(4)O4F trigonal bipyramids,  an edgeedge with one Mn(1)O5F octahedra,  an edgeedge with one Mn(3)O6 octahedra, and edges with two equivalent Mg(1)O5F octahedra. The Mn(2)-O(2) bond length is 1.89 Å. The Mn(2)-O(5) bond length is 1.89 Å. The Mn(2)-O(6) bond length is 1.87 Å. The Mn(2)-O(7) bond length is 1.90 Å. The Mn(2)-F(1) bond length is 2.00 Å. The Mn(2)-F(2) bond length is 2.10 Å. In the third Mn site, Mn(3) is bonded to one O(1), one O(4), one O(6), one O(7), one O(8), and one O(9) atom to form MnO6 octahedra that share corners with two equivalent Mn(6)O5 square pyramids,  a cornercorner with one Mn(4)O4F trigonal bipyramid,  an edgeedge with one Mn(2)O4F2 octahedra,  an edgeedge with one Mn(1)O5F octahedra, and edges with two equivalent Mg(1)O5F octahedra. The Mn(3)-O(1) bond length is 2.00 Å. The Mn(3)-O(4) bond length is 1.93 Å. The Mn(3)-O(6) bond length is 1.95 Å. The Mn(3)-O(7) bond length is 1.93 Å. The Mn(3)-O(8) bond length is 1.92 Å. The Mn(3)-O(9) bond length is 2.03 Å. In the fourth Mn site, Mn(4) is bonded to one O(1), one O(10), one O(2), one O(5), and one F(2) atom to form distorted MnO4F trigonal bipyramids that share  a cornercorner with one Mg(1)O5F octahedra,  a cornercorner with one Mn(3)O6 octahedra, corners with two equivalent Mn(1)O5F octahedra, corners with three equivalent Mn(2)O4F2 octahedra,  an edgeedge with one Mg(1)O5F octahedra, and  an edgeedge with one Mn(6)O5 square pyramid. The corner-sharing octahedral tilt angles range from 45-64°. The Mn(4)-O(1) bond length is 2.11 Å. The Mn(4)-O(10) bond length is 2.04 Å. The Mn(4)-O(2) bond length is 2.06 Å. The Mn(4)-O(5) bond length is 1.99 Å. The Mn(4)-F(2) bond length is 2.14 Å. In the fifth Mn site, Mn(5) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(8), one O(9), and one F(2) atom. The Mn(5)-O(1) bond length is 1.96 Å. The Mn(5)-O(3) bond length is 1.91 Å. The Mn(5)-O(8) bond length is 1.99 Å. The Mn(5)-O(9) bond length is 2.05 Å. The Mn(5)-F(2) bond length is 2.33 Å. In the sixth Mn site, Mn(6) is bonded to one O(10), one O(2), one O(3), one O(4), and one O(9) atom to form distorted MnO5 square pyramids that share  a cornercorner with one Mn(2)O4F2 octahedra, corners with two equivalent Mg(1)O5F octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(1)O5F octahedra, and  an edgeedge with one Mn(4)O4F trigonal bipyramid. The corner-sharing octahedral tilt angles range from 42-59°. The Mn(6)-O(10) bond length is 1.93 Å. The Mn(6)-O(2) bond length is 2.01 Å. The Mn(6)-O(3) bond length is 1.94 Å. The Mn(6)-O(4) bond length is 2.26 Å. The Mn(6)-O(9) bond length is 1.98 Å. There are ten 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 trigonal pyramids that share  a cornercorner with one F(2)MgMn3 trigonal pyramid, corners with three equivalent O(9)MgMn3 trigonal pyramids, and  an edgeedge with one F(2)MgMn3 trigonal pyramid. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Mg(1), one Mn(2), one Mn(4), 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(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(3), and one Mn(6) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mn(1), one Mn(2), and one Mn(4) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1), one Mn(2), and one Mn(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(3), and one Mn(5) atom. In the ninth O site, O(9) is bonded to one Mg(1), one Mn(3), one Mn(5), and one Mn(6) atom to form distorted OMgMn3 trigonal pyramids that share corners with three equivalent O(1)MgMn3 trigonal pyramids and  an edgeedge with one F(2)MgMn3 trigonal pyramid. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(4), and one Mn(6) atom. There are two inequivalent F sites. In the first F site, F(1) is bonded in a distorted L-shaped geometry to one Mn(1) and one Mn(2) atom. In the second F site, F(2) is bonded to one Mg(1), one Mn(2), one Mn(4), and one Mn(5) atom to form distorted FMgMn3 trigonal pyramids that share  a cornercorner with one O(1)MgMn3 trigonal pyramid,  an edgeedge with one O(1)MgMn3 trigonal pyramid, and  an edgeedge with one O(9)MgMn3 trigonal pyramid.