MgMn6O11F crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(1), one O(6), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, corners with two equivalent Mn(5)O5 square pyramids, edges with two equivalent Mg(1)O6 octahedra,  a faceface with one Mn(2)O6 octahedra, and  a faceface with one Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-35°. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(4), two equivalent O(1), and two equivalent O(11) atoms to form MnO5 square pyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mn(6)O4F2 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 50-72°. In the second Mn site, Mn(2) is bonded to one O(1), one O(5), two equivalent O(10), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, corners with two equivalent Mn(4)O5 square pyramids, corners with two equivalent Mn(5)O5 square pyramids, edges with two equivalent Mn(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 34°. In the third Mn site, Mn(3) is bonded to one O(6), one O(8), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, corners with two equivalent Mn(4)O5 square pyramids, corners with two equivalent Mn(5)O5 square pyramids, edges with two equivalent Mn(3)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 35°. In the fourth Mn site, Mn(4) is bonded to one O(9), two equivalent O(5), and two equivalent O(8) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(6)O4F2 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(4)O5 square pyramids. The corner-sharing octahedral tilt angles range from 49-51°. In the fifth Mn site, Mn(5) is bonded to one O(10), two equivalent O(6), and two equivalent O(7) atoms to form MnO5 square pyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mn(6)O4F2 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(5)O5 square pyramids. The corner-sharing octahedral tilt angles range from 50-73°. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(7), two equivalent O(9), and two equivalent F(1) atoms to form MnO4F2 octahedra that share corners with two equivalent Mn(1)O5 square pyramids, corners with two equivalent Mn(4)O5 square pyramids, corners with two equivalent Mn(5)O5 square pyramids, and edges with two equivalent Mn(6)O4F2 octahedra. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(2), and two equivalent Mn(1) atoms to form distorted corner-sharing OMgMn3 tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Mn(3) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Mn(2) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(1) and two equivalent Mn(3) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(2) and two equivalent Mn(4) atoms. In the sixth O site, O(6) is bonded to one Mg(1), one Mn(3), and two equivalent Mn(5) atoms to form distorted corner-sharing OMgMn3 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Mn(6) and two equivalent Mn(5) atoms. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(3) and two equivalent Mn(4) atoms. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mn(4) and two equivalent Mn(6) atoms. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mn(5) and two equivalent Mn(2) atoms. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Mn(6) and two equivalent Mn(1) atoms. F(1) is bonded in an L-shaped geometry to two equivalent Mn(6) atoms.
MgMn6O11F crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one O(1), one O(6), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, corners with two equivalent Mn(5)O5 square pyramids, edges with two equivalent Mg(1)O6 octahedra,  a faceface with one Mn(2)O6 octahedra, and  a faceface with one Mn(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-35°. The Mg(1)-O(1) bond length is 2.07 Å. The Mg(1)-O(6) bond length is 2.07 Å. Both Mg(1)-O(2) bond lengths are 2.11 Å. Both Mg(1)-O(3) bond lengths are 2.11 Å. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(4), two equivalent O(1), and two equivalent O(11) atoms to form MnO5 square pyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mn(6)O4F2 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(1)O5 square pyramids. The corner-sharing octahedral tilt angles range from 50-72°. The Mn(1)-O(4) bond length is 2.04 Å. Both Mn(1)-O(1) bond lengths are 1.96 Å. Both Mn(1)-O(11) bond lengths are 1.92 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(5), two equivalent O(10), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, corners with two equivalent Mn(4)O5 square pyramids, corners with two equivalent Mn(5)O5 square pyramids, edges with two equivalent Mn(2)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 34°. The Mn(2)-O(1) bond length is 2.06 Å. The Mn(2)-O(5) bond length is 1.92 Å. Both Mn(2)-O(10) bond lengths are 1.90 Å. Both Mn(2)-O(3) bond lengths are 2.00 Å. In the third Mn site, Mn(3) is bonded to one O(6), one O(8), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mn(1)O5 square pyramids, corners with two equivalent Mn(4)O5 square pyramids, corners with two equivalent Mn(5)O5 square pyramids, edges with two equivalent Mn(3)O6 octahedra, and  a faceface with one Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 35°. The Mn(3)-O(6) bond length is 2.05 Å. The Mn(3)-O(8) bond length is 1.92 Å. Both Mn(3)-O(2) bond lengths are 2.00 Å. Both Mn(3)-O(4) bond lengths are 1.90 Å. In the fourth Mn site, Mn(4) is bonded to one O(9), two equivalent O(5), and two equivalent O(8) atoms to form MnO5 square pyramids that share corners with two equivalent Mn(6)O4F2 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(4)O5 square pyramids. The corner-sharing octahedral tilt angles range from 49-51°. The Mn(4)-O(9) bond length is 2.14 Å. Both Mn(4)-O(5) bond lengths are 1.92 Å. Both Mn(4)-O(8) bond lengths are 1.94 Å. In the fifth Mn site, Mn(5) is bonded to one O(10), two equivalent O(6), and two equivalent O(7) atoms to form MnO5 square pyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with two equivalent Mn(6)O4F2 octahedra, corners with two equivalent Mn(2)O6 octahedra, corners with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Mn(5)O5 square pyramids. The corner-sharing octahedral tilt angles range from 50-73°. The Mn(5)-O(10) bond length is 2.08 Å. Both Mn(5)-O(6) bond lengths are 1.96 Å. Both Mn(5)-O(7) bond lengths are 1.92 Å. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(7), two equivalent O(9), and two equivalent F(1) atoms to form MnO4F2 octahedra that share corners with two equivalent Mn(1)O5 square pyramids, corners with two equivalent Mn(4)O5 square pyramids, corners with two equivalent Mn(5)O5 square pyramids, and edges with two equivalent Mn(6)O4F2 octahedra. The Mn(6)-O(11) bond length is 1.91 Å. The Mn(6)-O(7) bond length is 1.91 Å. Both Mn(6)-O(9) bond lengths are 1.90 Å. Both Mn(6)-F(1) bond lengths are 1.98 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(2), and two equivalent Mn(1) atoms to form distorted corner-sharing OMgMn3 tetrahedra. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Mn(3) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Mg(1) and two equivalent Mn(2) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Mn(1) and two equivalent Mn(3) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(2) and two equivalent Mn(4) atoms. In the sixth O site, O(6) is bonded to one Mg(1), one Mn(3), and two equivalent Mn(5) atoms to form distorted corner-sharing OMgMn3 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Mn(6) and two equivalent Mn(5) atoms. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(3) and two equivalent Mn(4) atoms. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Mn(4) and two equivalent Mn(6) atoms. In the tenth O site, O(10) is bonded in a distorted trigonal planar geometry to one Mn(5) and two equivalent Mn(2) atoms. In the eleventh O site, O(11) is bonded in a trigonal planar geometry to one Mn(6) and two equivalent Mn(1) atoms. F(1) is bonded in an L-shaped geometry to two equivalent Mn(6) atoms.