MgTiV4MnO12 crystallizes in the monoclinic C2 space group. Mg(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted MgO6 pentagonal pyramids that share corners with four equivalent V(1)O4 tetrahedra,  an edgeedge with one Ti(1)O6 octahedra, and faces with two equivalent V(2)O5 trigonal bipyramids. Ti(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms to form distorted TiO6 octahedra that share corners with two equivalent V(1)O4 tetrahedra, corners with four equivalent V(2)O5 trigonal bipyramids,  an edgeedge with one Mg(1)O6 pentagonal pyramid, and edges with two equivalent Mn(1)O6 pentagonal pyramids. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form VO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids, corners with two equivalent Mn(1)O6 pentagonal pyramids, and corners with three equivalent V(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 54°. In the second V site, V(2) is bonded to one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form VO5 trigonal bipyramids that share corners with two equivalent Ti(1)O6 octahedra, corners with three equivalent V(1)O4 tetrahedra,  an edgeedge with one Mn(1)O6 pentagonal pyramid, and  a faceface with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 25-36°. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent V(1)O4 tetrahedra, edges with two equivalent Ti(1)O6 octahedra, and edges with two equivalent V(2)O5 trigonal bipyramids. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ti(1), one V(1), and one Mn(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one Mn(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Ti(1), one V(2), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one V(1), and one V(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(1), and one V(2) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Mg(1), one Ti(1), and one V(2) atom.
MgTiV4MnO12 crystallizes in the monoclinic C2 space group. Mg(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted MgO6 pentagonal pyramids that share corners with four equivalent V(1)O4 tetrahedra,  an edgeedge with one Ti(1)O6 octahedra, and faces with two equivalent V(2)O5 trigonal bipyramids. Both Mg(1)-O(4) bond lengths are 2.26 Å. Both Mg(1)-O(5) bond lengths are 2.08 Å. Both Mg(1)-O(6) bond lengths are 2.13 Å. Ti(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms to form distorted TiO6 octahedra that share corners with two equivalent V(1)O4 tetrahedra, corners with four equivalent V(2)O5 trigonal bipyramids,  an edgeedge with one Mg(1)O6 pentagonal pyramid, and edges with two equivalent Mn(1)O6 pentagonal pyramids. Both Ti(1)-O(1) bond lengths are 2.17 Å. Both Ti(1)-O(3) bond lengths are 1.93 Å. Both Ti(1)-O(6) bond lengths are 1.92 Å. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(4), and one O(5) atom to form VO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra, corners with two equivalent Mg(1)O6 pentagonal pyramids, corners with two equivalent Mn(1)O6 pentagonal pyramids, and corners with three equivalent V(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 54°. The V(1)-O(1) bond length is 1.73 Å. The V(1)-O(2) bond length is 1.76 Å. The V(1)-O(4) bond length is 1.73 Å. The V(1)-O(5) bond length is 1.80 Å. In the second V site, V(2) is bonded to one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form VO5 trigonal bipyramids that share corners with two equivalent Ti(1)O6 octahedra, corners with three equivalent V(1)O4 tetrahedra,  an edgeedge with one Mn(1)O6 pentagonal pyramid, and  a faceface with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 25-36°. The V(2)-O(2) bond length is 2.07 Å. The V(2)-O(3) bond length is 1.90 Å. The V(2)-O(4) bond length is 2.12 Å. The V(2)-O(5) bond length is 1.97 Å. The V(2)-O(6) bond length is 1.91 Å. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted MnO6 pentagonal pyramids that share corners with four equivalent V(1)O4 tetrahedra, edges with two equivalent Ti(1)O6 octahedra, and edges with two equivalent V(2)O5 trigonal bipyramids. Both Mn(1)-O(1) bond lengths are 2.30 Å. Both Mn(1)-O(2) bond lengths are 2.24 Å. Both Mn(1)-O(3) bond lengths are 2.08 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Ti(1), one V(1), and one Mn(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one V(1), one V(2), and one Mn(1) atom. In the third O site, O(3) is bonded in a distorted trigonal non-coplanar geometry to one Ti(1), one V(2), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Mg(1), one V(1), and one V(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mg(1), one V(1), and one V(2) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Mg(1), one Ti(1), and one V(2) atom.