MgTiSiO5 crystallizes in the monoclinic Cc space group. Mg(1) is bonded in a 7-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. Ti(1) is bonded to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with four equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-56°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1), one Ti(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Mg(1), one Ti(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Ti(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Mg(1), one Ti(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(1) and two equivalent Ti(1) atoms.
MgTiSiO5 crystallizes in the monoclinic Cc space group. Mg(1) is bonded in a 7-coordinate geometry to one O(3), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. The Mg(1)-O(3) bond length is 2.27 Å. The Mg(1)-O(4) bond length is 2.20 Å. The Mg(1)-O(5) bond length is 2.00 Å. There is one shorter (2.37 Å) and one longer (2.57 Å) Mg(1)-O(1) bond length. There is one shorter (2.33 Å) and one longer (2.75 Å) Mg(1)-O(2) bond length. Ti(1) is bonded to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra and corners with four equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. The Ti(1)-O(1) bond length is 2.04 Å. The Ti(1)-O(2) bond length is 2.01 Å. The Ti(1)-O(3) bond length is 1.97 Å. The Ti(1)-O(4) bond length is 1.98 Å. There is one shorter (1.80 Å) and one longer (2.08 Å) Ti(1)-O(5) bond length. Si(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SiO4 tetrahedra that share corners with four equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-56°. The Si(1)-O(1) bond length is 1.65 Å. The Si(1)-O(2) bond length is 1.64 Å. The Si(1)-O(3) bond length is 1.63 Å. The Si(1)-O(4) bond length is 1.62 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Mg(1), one Ti(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Mg(1), one Ti(1), and one Si(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Ti(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Mg(1), one Ti(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(1) and two equivalent Ti(1) atoms.