LaTa2CuO7Cl crystallizes in the tetragonal P4/mmm space group. La(1) is bonded to four equivalent O(3) and eight equivalent O(1) atoms to form a mixture of corner and face-sharing LaO12 cuboctahedra. Ta(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), and four equivalent O(1) atoms. Cu(1) is bonded in a distorted linear geometry to two equivalent O(2) and four equivalent Cl(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent La(1) and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a linear geometry to one Ta(1) and one Cu(1) atom. In the third O site, O(3) is bonded to four equivalent La(1) and two equivalent Ta(1) atoms to form a mixture of corner and edge-sharing OLa4Ta2 octahedra. The corner-sharing octahedra are not tilted. Cl(1) is bonded in a square co-planar geometry to four equivalent Cu(1) atoms.
LaTa2CuO7Cl crystallizes in the tetragonal P4/mmm space group. La(1) is bonded to four equivalent O(3) and eight equivalent O(1) atoms to form a mixture of corner and face-sharing LaO12 cuboctahedra. All La(1)-O(3) bond lengths are 2.77 Å. All La(1)-O(1) bond lengths are 2.67 Å. Ta(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), and four equivalent O(1) atoms. The Ta(1)-O(2) bond length is 1.80 Å. The Ta(1)-O(3) bond length is 2.24 Å. All Ta(1)-O(1) bond lengths are 2.00 Å. Cu(1) is bonded in a distorted linear geometry to two equivalent O(2) and four equivalent Cl(1) atoms. Both Cu(1)-O(2) bond lengths are 1.84 Å. All Cu(1)-Cl(1) bond lengths are 2.77 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to two equivalent La(1) and two equivalent Ta(1) atoms. In the second O site, O(2) is bonded in a linear geometry to one Ta(1) and one Cu(1) atom. In the third O site, O(3) is bonded to four equivalent La(1) and two equivalent Ta(1) atoms to form a mixture of corner and edge-sharing OLa4Ta2 octahedra. The corner-sharing octahedra are not tilted. Cl(1) is bonded in a square co-planar geometry to four equivalent Cu(1) atoms.