TbH3 crystallizes in the trigonal P-3c1 space group. Tb(1) is bonded in a 11-coordinate geometry to one H(3), two equivalent H(2), and eight equivalent H(1) atoms. There are three inequivalent H sites. In the first H site, H(2) is bonded in a trigonal planar geometry to three equivalent Tb(1) atoms. In the second H site, H(3) is bonded in a trigonal planar geometry to three equivalent Tb(1) atoms. In the third H site, H(1) is bonded to four equivalent Tb(1) atoms to form a mixture of distorted corner, face, and edge-sharing HTb4 tetrahedra.
TbH3 crystallizes in the trigonal P-3c1 space group. Tb(1) is bonded in a 11-coordinate geometry to one H(3), two equivalent H(2), and eight equivalent H(1) atoms. The Tb(1)-H(3) bond length is 2.14 Å. Both Tb(1)-H(2) bond lengths are 2.15 Å. There are a spread of Tb(1)-H(1) bond distances ranging from 2.26-2.52 Å. There are three inequivalent H sites. In the first H site, H(2) is bonded in a trigonal planar geometry to three equivalent Tb(1) atoms. In the second H site, H(3) is bonded in a trigonal planar geometry to three equivalent Tb(1) atoms. In the third H site, H(1) is bonded to four equivalent Tb(1) atoms to form a mixture of distorted corner, face, and edge-sharing HTb4 tetrahedra.