LaTaO4 crystallizes in the orthorhombic Cmc2_1 space group. La(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), three equivalent O(3), and three equivalent O(4) atoms. Ta(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 11-40°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one La(1) and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent La(1) and two equivalent Ta(1) atoms. In the third O site, O(3) is bonded to three equivalent La(1) and one Ta(1) atom to form corner-sharing OLa3Ta tetrahedra. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent La(1) and one Ta(1) atom.
LaTaO4 crystallizes in the orthorhombic Cmc2_1 space group. La(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), three equivalent O(3), and three equivalent O(4) atoms. The La(1)-O(1) bond length is 2.68 Å. Both La(1)-O(2) bond lengths are 2.94 Å. There is one shorter (2.38 Å) and two longer (2.45 Å) La(1)-O(3) bond lengths. There are two shorter (2.53 Å) and one longer (2.73 Å) La(1)-O(4) bond length. Ta(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedral tilt angles range from 11-40°. The Ta(1)-O(3) bond length is 2.05 Å. The Ta(1)-O(4) bond length is 1.90 Å. Both Ta(1)-O(1) bond lengths are 1.99 Å. There is one shorter (1.92 Å) and one longer (2.10 Å) Ta(1)-O(2) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one La(1) and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent La(1) and two equivalent Ta(1) atoms. In the third O site, O(3) is bonded to three equivalent La(1) and one Ta(1) atom to form corner-sharing OLa3Ta tetrahedra. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to three equivalent La(1) and one Ta(1) atom.