MgV4O10 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with four equivalent V(1)O4 tetrahedra and corners with four equivalent V(2)O5 trigonal bipyramids. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form VO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra and corners with four equivalent V(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 63-64°. In the second V site, V(2) is bonded to one O(1), one O(4), one O(5), and two equivalent O(2) atoms to form distorted VO5 trigonal bipyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent V(1)O4 tetrahedra, and  an edgeedge with one V(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 56-57°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent V(2) atoms. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(1), one V(1), and one V(2) atom.
MgV4O10 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms to form MgO6 octahedra that share corners with four equivalent V(1)O4 tetrahedra and corners with four equivalent V(2)O5 trigonal bipyramids. Both Mg(1)-O(3) bond lengths are 2.05 Å. Both Mg(1)-O(4) bond lengths are 2.06 Å. Both Mg(1)-O(5) bond lengths are 2.47 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(3), and one O(5) atom to form VO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra and corners with four equivalent V(2)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 63-64°. The V(1)-O(1) bond length is 1.72 Å. The V(1)-O(2) bond length is 1.84 Å. The V(1)-O(3) bond length is 1.67 Å. The V(1)-O(5) bond length is 1.79 Å. In the second V site, V(2) is bonded to one O(1), one O(4), one O(5), and two equivalent O(2) atoms to form distorted VO5 trigonal bipyramids that share corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent V(1)O4 tetrahedra, and  an edgeedge with one V(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 56-57°. The V(2)-O(1) bond length is 1.94 Å. The V(2)-O(4) bond length is 1.66 Å. The V(2)-O(5) bond length is 2.00 Å. There is one shorter (1.98 Å) and one longer (2.02 Å) V(2)-O(2) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one V(1) and one V(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one V(1) and two equivalent V(2) atoms. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Mg(1) and one V(2) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(1), one V(1), and one V(2) atom.