MgTi2(Ga2O5)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(2), and four equivalent O(6) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms. In the second Ti site, Ti(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ga(2)O5 trigonal bipyramids, and corners with six equivalent Ga(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 3°. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(5), one O(6), and two equivalent O(2) atoms to form GaO5 trigonal bipyramids that share corners with three equivalent Ti(2)O6 octahedra, corners with two equivalent Ga(1)O5 trigonal bipyramids, corners with two equivalent Ga(2)O5 trigonal bipyramids, and  an edgeedge with one Ga(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 19-72°. In the second Ga site, Ga(2) is bonded to one O(1), one O(4), one O(6), and two equivalent O(5) atoms to form GaO5 trigonal bipyramids that share  a cornercorner with one Ti(2)O6 octahedra, corners with two equivalent Ga(1)O5 trigonal bipyramids, corners with three equivalent Ga(2)O5 trigonal bipyramids, and  an edgeedge with one Ga(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 71°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Ti(1), one Ga(1), and one Ga(2) atom. In the second O site, O(2) is bonded to one Mg(1), one Ti(2), and two equivalent Ga(1) atoms to form OMgTiGa2 trigonal pyramids that share corners with four equivalent O(6)Mg2TiGa2 trigonal bipyramids, corners with two equivalent O(2)MgTiGa2 trigonal pyramids, corners with two equivalent O(5)TiGa3 trigonal pyramids, edges with two equivalent O(6)Mg2TiGa2 trigonal bipyramids, and  an edgeedge with one O(2)MgTiGa2 trigonal pyramid. In the third O site, O(3) is bonded in a T-shaped geometry to one Mg(1) and two equivalent Ti(2) atoms. In the fourth O site, O(4) is bonded to two equivalent Ti(1) and two equivalent Ga(2) atoms to form distorted OTi2Ga2 tetrahedra that share corners with two equivalent O(4)Ti2Ga2 tetrahedra, corners with two equivalent O(6)Mg2TiGa2 trigonal bipyramids, and edges with four equivalent O(5)TiGa3 trigonal pyramids. In the fifth O site, O(5) is bonded to one Ti(1), one Ga(1), and two equivalent Ga(2) atoms to form OTiGa3 trigonal pyramids that share corners with three equivalent O(6)Mg2TiGa2 trigonal bipyramids, corners with two equivalent O(2)MgTiGa2 trigonal pyramids, corners with three equivalent O(5)TiGa3 trigonal pyramids, and edges with two equivalent O(4)Ti2Ga2 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Mg(1), one Ti(2), one Ga(1), and one Ga(2) atom to form OMg2TiGa2 trigonal bipyramids that share  a cornercorner with one O(4)Ti2Ga2 tetrahedra, corners with four equivalent O(6)Mg2TiGa2 trigonal bipyramids, corners with three equivalent O(5)TiGa3 trigonal pyramids, corners with four equivalent O(2)MgTiGa2 trigonal pyramids, edges with two equivalent O(2)MgTiGa2 trigonal pyramids, and  a faceface with one O(6)Mg2TiGa2 trigonal bipyramid.
MgTi2(Ga2O5)2 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a 7-coordinate geometry to one O(3), two equivalent O(2), and four equivalent O(6) atoms. The Mg(1)-O(3) bond length is 2.12 Å. Both Mg(1)-O(2) bond lengths are 2.14 Å. All Mg(1)-O(6) bond lengths are 2.34 Å. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms. Both Ti(1)-O(1) bond lengths are 1.97 Å. Both Ti(1)-O(4) bond lengths are 2.03 Å. Both Ti(1)-O(5) bond lengths are 2.28 Å. In the second Ti site, Ti(2) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(6) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ga(2)O5 trigonal bipyramids, and corners with six equivalent Ga(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 3°. Both Ti(2)-O(2) bond lengths are 2.05 Å. Both Ti(2)-O(3) bond lengths are 1.85 Å. Both Ti(2)-O(6) bond lengths are 2.05 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(5), one O(6), and two equivalent O(2) atoms to form GaO5 trigonal bipyramids that share corners with three equivalent Ti(2)O6 octahedra, corners with two equivalent Ga(1)O5 trigonal bipyramids, corners with two equivalent Ga(2)O5 trigonal bipyramids, and  an edgeedge with one Ga(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 19-72°. The Ga(1)-O(1) bond length is 1.90 Å. The Ga(1)-O(5) bond length is 2.02 Å. The Ga(1)-O(6) bond length is 2.07 Å. Both Ga(1)-O(2) bond lengths are 1.99 Å. In the second Ga site, Ga(2) is bonded to one O(1), one O(4), one O(6), and two equivalent O(5) atoms to form GaO5 trigonal bipyramids that share  a cornercorner with one Ti(2)O6 octahedra, corners with two equivalent Ga(1)O5 trigonal bipyramids, corners with three equivalent Ga(2)O5 trigonal bipyramids, and  an edgeedge with one Ga(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 71°. The Ga(2)-O(1) bond length is 1.89 Å. The Ga(2)-O(4) bond length is 2.18 Å. The Ga(2)-O(6) bond length is 2.09 Å. Both Ga(2)-O(5) bond lengths are 2.00 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Ti(1), one Ga(1), and one Ga(2) atom. In the second O site, O(2) is bonded to one Mg(1), one Ti(2), and two equivalent Ga(1) atoms to form OMgTiGa2 trigonal pyramids that share corners with four equivalent O(6)Mg2TiGa2 trigonal bipyramids, corners with two equivalent O(2)MgTiGa2 trigonal pyramids, corners with two equivalent O(5)TiGa3 trigonal pyramids, edges with two equivalent O(6)Mg2TiGa2 trigonal bipyramids, and  an edgeedge with one O(2)MgTiGa2 trigonal pyramid. In the third O site, O(3) is bonded in a T-shaped geometry to one Mg(1) and two equivalent Ti(2) atoms. In the fourth O site, O(4) is bonded to two equivalent Ti(1) and two equivalent Ga(2) atoms to form distorted OTi2Ga2 tetrahedra that share corners with two equivalent O(4)Ti2Ga2 tetrahedra, corners with two equivalent O(6)Mg2TiGa2 trigonal bipyramids, and edges with four equivalent O(5)TiGa3 trigonal pyramids. In the fifth O site, O(5) is bonded to one Ti(1), one Ga(1), and two equivalent Ga(2) atoms to form OTiGa3 trigonal pyramids that share corners with three equivalent O(6)Mg2TiGa2 trigonal bipyramids, corners with two equivalent O(2)MgTiGa2 trigonal pyramids, corners with three equivalent O(5)TiGa3 trigonal pyramids, and edges with two equivalent O(4)Ti2Ga2 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Mg(1), one Ti(2), one Ga(1), and one Ga(2) atom to form OMg2TiGa2 trigonal bipyramids that share  a cornercorner with one O(4)Ti2Ga2 tetrahedra, corners with four equivalent O(6)Mg2TiGa2 trigonal bipyramids, corners with three equivalent O(5)TiGa3 trigonal pyramids, corners with four equivalent O(2)MgTiGa2 trigonal pyramids, edges with two equivalent O(2)MgTiGa2 trigonal pyramids, and  a faceface with one O(6)Mg2TiGa2 trigonal bipyramid.