Ga4TiO8 crystallizes in the monoclinic C2/m space group. Ti(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form TiO6 octahedra that share corners with four equivalent Ga(2)O6 octahedra, corners with four equivalent Ga(1)O4 tetrahedra, and edges with two equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form GaO4 tetrahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with five equivalent Ga(2)O6 octahedra, and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-68°. In the second Ga site, Ga(2) is bonded to one O(1), two equivalent O(3), and three equivalent O(4) atoms to form GaO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with five equivalent Ga(1)O4 tetrahedra, and edges with four equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Ga(2) and two equivalent Ga(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Ti(1) and one Ga(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ti(1) and two equivalent Ga(2) atoms. In the fourth O site, O(4) is bonded to one Ga(1) and three equivalent Ga(2) atoms to form a mixture of distorted corner and edge-sharing OGa4 tetrahedra.
Ga4TiO8 crystallizes in the monoclinic C2/m space group. Ti(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form TiO6 octahedra that share corners with four equivalent Ga(2)O6 octahedra, corners with four equivalent Ga(1)O4 tetrahedra, and edges with two equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. Both Ti(1)-O(3) bond lengths are 1.93 Å. All Ti(1)-O(2) bond lengths are 1.99 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form GaO4 tetrahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with five equivalent Ga(2)O6 octahedra, and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 56-68°. The Ga(1)-O(2) bond length is 1.85 Å. The Ga(1)-O(4) bond length is 1.87 Å. Both Ga(1)-O(1) bond lengths are 1.83 Å. In the second Ga site, Ga(2) is bonded to one O(1), two equivalent O(3), and three equivalent O(4) atoms to form GaO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with five equivalent Ga(1)O4 tetrahedra, and edges with four equivalent Ga(2)O6 octahedra. The corner-sharing octahedral tilt angles are 52°. The Ga(2)-O(1) bond length is 1.95 Å. Both Ga(2)-O(3) bond lengths are 1.93 Å. There is one shorter (2.06 Å) and two longer (2.07 Å) Ga(2)-O(4) bond lengths. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Ga(2) and two equivalent Ga(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Ti(1) and one Ga(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ti(1) and two equivalent Ga(2) atoms. In the fourth O site, O(4) is bonded to one Ga(1) and three equivalent Ga(2) atoms to form a mixture of distorted corner and edge-sharing OGa4 tetrahedra.