TbCO4 crystallizes in the orthorhombic P2_12_12_1 space group. Tb(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and three equivalent O(3) atoms. C(1) is bonded in a trigonal planar geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Tb(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Tb(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to three equivalent Tb(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Tb(1) and one C(1) atom.
TbCO4 crystallizes in the orthorhombic P2_12_12_1 space group. Tb(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and three equivalent O(3) atoms. There is one shorter (2.23 Å) and one longer (2.26 Å) Tb(1)-O(1) bond length. There is one shorter (2.47 Å) and one longer (2.60 Å) Tb(1)-O(2) bond length. There is one shorter (2.41 Å) and one longer (2.43 Å) Tb(1)-O(4) bond length. There are a spread of Tb(1)-O(3) bond distances ranging from 2.51-2.85 Å. C(1) is bonded in a trigonal planar geometry to one O(2), one O(3), and one O(4) atom. The C(1)-O(2) bond length is 1.28 Å. The C(1)-O(3) bond length is 1.32 Å. The C(1)-O(4) bond length is 1.30 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Tb(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Tb(1) and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to three equivalent Tb(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Tb(1) and one C(1) atom.