CeTaO4 crystallizes in the monoclinic P2_1/c space group. Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), three equivalent O(2), and three equivalent O(3) atoms. Ta(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 30-42°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ce(1) and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Ce(1) and one Ta(1) atom. In the third O site, O(3) is bonded to three equivalent Ce(1) and one Ta(1) atom to form a mixture of distorted corner and edge-sharing OCe3Ta tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ce(1) and two equivalent Ta(1) atoms.
CeTaO4 crystallizes in the monoclinic P2_1/c space group. Ce(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), three equivalent O(2), and three equivalent O(3) atoms. The Ce(1)-O(1) bond length is 2.51 Å. The Ce(1)-O(4) bond length is 2.70 Å. There are a spread of Ce(1)-O(2) bond distances ranging from 2.38-2.84 Å. There are a spread of Ce(1)-O(3) bond distances ranging from 2.34-2.56 Å. Ta(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 30-42°. The Ta(1)-O(2) bond length is 1.93 Å. The Ta(1)-O(3) bond length is 2.03 Å. There is one shorter (1.96 Å) and one longer (2.06 Å) Ta(1)-O(1) bond length. There is one shorter (1.96 Å) and one longer (2.04 Å) Ta(1)-O(4) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ce(1) and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Ce(1) and one Ta(1) atom. In the third O site, O(3) is bonded to three equivalent Ce(1) and one Ta(1) atom to form a mixture of distorted corner and edge-sharing OCe3Ta tetrahedra. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Ce(1) and two equivalent Ta(1) atoms.