MgTi2(Ga2O5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(3), one O(4), one O(7), and one O(8) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Ga(2)O6 octahedra, corners with two equivalent Ga(1)O5 square pyramids,  an edgeedge with one Ga(1)O5 square pyramid, and  an edgeedge with one Ti(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 14°. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(3), one O(6), and one O(7) atom. In the second Ti site, Ti(2) is bonded to one O(1), one O(10), one O(4), one O(5), and one O(9) atom to form distorted TiO5 trigonal bipyramids that share  a cornercorner with one Ga(1)O5 square pyramid, edges with two equivalent Ga(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted GaO5 square pyramids that share  a cornercorner with one Ga(2)O6 octahedra,  a cornercorner with one Ti(2)O5 trigonal bipyramid, corners with two equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 51°. In the second Ga site, Ga(2) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(9) atom to form distorted GaO6 octahedra that share  a cornercorner with one Ga(1)O5 square pyramid,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and edges with two equivalent Ti(2)O5 trigonal bipyramids. In the third Ga site, Ga(3) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(8), and one O(9) atom. In the fourth Ga site, Ga(4) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(5), one O(6), one O(7), and one O(9) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a see-saw-like geometry to one Mg(1), one Ti(2), one Ga(2), and one Ga(3) atom. In the second O site, O(2) is bonded to one Ti(1), one Ga(1), one Ga(2), and one Ga(4) atom to form distorted OTiGa3 trigonal pyramids that share corners with two equivalent O(3)MgTiGa2 trigonal pyramids and  an edgeedge with one O(9)TiGa3 trigonal pyramid. In the third O site, O(3) is bonded to one Mg(1), one Ti(1), one Ga(1), and one Ga(3) atom to form distorted corner-sharing OMgTiGa2 trigonal pyramids. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Ti(2), one Ga(1), and one Ga(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ti(2), one Ga(2), and one Ga(4) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Ti(1), one Ga(2), and one Ga(4) atom. In the seventh O site, O(7) is bonded in a see-saw-like geometry to one Mg(1), one Ti(1), one Ga(1), and one Ga(4) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Mg(1), one Ga(1), and one Ga(3) atom. In the ninth O site, O(9) is bonded to one Ti(2), one Ga(2), one Ga(3), and one Ga(4) atom to form OTiGa3 trigonal pyramids that share  a cornercorner with one O(3)MgTiGa2 trigonal pyramid and  an edgeedge with one O(2)TiGa3 trigonal pyramid. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Ti(1), one Ti(2), one Ga(2), and one Ga(4) atom.
MgTi2(Ga2O5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(3), one O(4), one O(7), and one O(8) atom to form distorted MgO5 trigonal bipyramids that share  a cornercorner with one Ga(2)O6 octahedra, corners with two equivalent Ga(1)O5 square pyramids,  an edgeedge with one Ga(1)O5 square pyramid, and  an edgeedge with one Ti(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 14°. The Mg(1)-O(1) bond length is 2.08 Å. The Mg(1)-O(3) bond length is 2.16 Å. The Mg(1)-O(4) bond length is 2.05 Å. The Mg(1)-O(7) bond length is 2.08 Å. The Mg(1)-O(8) bond length is 2.02 Å. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(3), one O(6), and one O(7) atom. The Ti(1)-O(10) bond length is 1.94 Å. The Ti(1)-O(2) bond length is 2.01 Å. The Ti(1)-O(3) bond length is 2.11 Å. The Ti(1)-O(6) bond length is 1.95 Å. The Ti(1)-O(7) bond length is 2.17 Å. In the second Ti site, Ti(2) is bonded to one O(1), one O(10), one O(4), one O(5), and one O(9) atom to form distorted TiO5 trigonal bipyramids that share  a cornercorner with one Ga(1)O5 square pyramid, edges with two equivalent Ga(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The Ti(2)-O(1) bond length is 2.14 Å. The Ti(2)-O(10) bond length is 1.92 Å. The Ti(2)-O(4) bond length is 1.97 Å. The Ti(2)-O(5) bond length is 1.90 Å. The Ti(2)-O(9) bond length is 2.05 Å. There are four inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted GaO5 square pyramids that share  a cornercorner with one Ga(2)O6 octahedra,  a cornercorner with one Ti(2)O5 trigonal bipyramid, corners with two equivalent Mg(1)O5 trigonal bipyramids, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 51°. The Ga(1)-O(2) bond length is 1.90 Å. The Ga(1)-O(3) bond length is 2.12 Å. The Ga(1)-O(4) bond length is 1.90 Å. The Ga(1)-O(7) bond length is 2.06 Å. The Ga(1)-O(8) bond length is 1.92 Å. In the second Ga site, Ga(2) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(9) atom to form distorted GaO6 octahedra that share  a cornercorner with one Ga(1)O5 square pyramid,  a cornercorner with one Mg(1)O5 trigonal bipyramid, and edges with two equivalent Ti(2)O5 trigonal bipyramids. The Ga(2)-O(1) bond length is 2.21 Å. The Ga(2)-O(10) bond length is 2.10 Å. The Ga(2)-O(2) bond length is 2.03 Å. The Ga(2)-O(5) bond length is 2.08 Å. The Ga(2)-O(6) bond length is 1.88 Å. The Ga(2)-O(9) bond length is 1.99 Å. In the third Ga site, Ga(3) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), one O(8), and one O(9) atom. The Ga(3)-O(1) bond length is 1.96 Å. The Ga(3)-O(3) bond length is 1.87 Å. The Ga(3)-O(4) bond length is 2.24 Å. The Ga(3)-O(8) bond length is 1.92 Å. The Ga(3)-O(9) bond length is 2.02 Å. In the fourth Ga site, Ga(4) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(5), one O(6), one O(7), and one O(9) atom. The Ga(4)-O(10) bond length is 2.06 Å. The Ga(4)-O(2) bond length is 2.34 Å. The Ga(4)-O(5) bond length is 1.93 Å. The Ga(4)-O(6) bond length is 1.96 Å. The Ga(4)-O(7) bond length is 1.99 Å. The Ga(4)-O(9) bond length is 2.14 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a see-saw-like geometry to one Mg(1), one Ti(2), one Ga(2), and one Ga(3) atom. In the second O site, O(2) is bonded to one Ti(1), one Ga(1), one Ga(2), and one Ga(4) atom to form distorted OTiGa3 trigonal pyramids that share corners with two equivalent O(3)MgTiGa2 trigonal pyramids and  an edgeedge with one O(9)TiGa3 trigonal pyramid. In the third O site, O(3) is bonded to one Mg(1), one Ti(1), one Ga(1), and one Ga(3) atom to form distorted corner-sharing OMgTiGa2 trigonal pyramids. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Ti(2), one Ga(1), and one Ga(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ti(2), one Ga(2), and one Ga(4) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Ti(1), one Ga(2), and one Ga(4) atom. In the seventh O site, O(7) is bonded in a see-saw-like geometry to one Mg(1), one Ti(1), one Ga(1), and one Ga(4) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Mg(1), one Ga(1), and one Ga(3) atom. In the ninth O site, O(9) is bonded to one Ti(2), one Ga(2), one Ga(3), and one Ga(4) atom to form OTiGa3 trigonal pyramids that share  a cornercorner with one O(3)MgTiGa2 trigonal pyramid and  an edgeedge with one O(2)TiGa3 trigonal pyramid. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Ti(1), one Ti(2), one Ga(2), and one Ga(4) atom.