La2Ti3O9 crystallizes in the hexagonal P6_3/m space group. La(1) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. Ti(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form corner-sharing TiO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Ti(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent La(1) and one Ti(1) atom.
La2Ti3O9 crystallizes in the hexagonal P6_3/m space group. La(1) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. There are three shorter (2.37 Å) and three longer (2.60 Å) La(1)-O(2) bond lengths. Ti(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form corner-sharing TiO4 tetrahedra. There is one shorter (1.84 Å) and one longer (1.88 Å) Ti(1)-O(1) bond length. Both Ti(1)-O(2) bond lengths are 1.81 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Ti(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent La(1) and one Ti(1) atom.