TbH3 is Sodium arsenide structured and crystallizes in the hexagonal P6_3/mmc space group. Tb(1) is bonded in a 11-coordinate geometry to three equivalent H(1) and eight equivalent H(2) atoms. There are two inequivalent H sites. In the first H site, H(1) is bonded in a trigonal planar geometry to three equivalent Tb(1) atoms. In the second H site, H(2) is bonded to four equivalent Tb(1) atoms to form a mixture of corner, edge, and face-sharing HTb4 tetrahedra.
TbH3 is Sodium arsenide structured and crystallizes in the hexagonal P6_3/mmc space group. Tb(1) is bonded in a 11-coordinate geometry to three equivalent H(1) and eight equivalent H(2) atoms. All Tb(1)-H(1) bond lengths are 2.13 Å. There are two shorter (2.28 Å) and six longer (2.37 Å) Tb(1)-H(2) bond lengths. There are two inequivalent H sites. In the first H site, H(1) is bonded in a trigonal planar geometry to three equivalent Tb(1) atoms. In the second H site, H(2) is bonded to four equivalent Tb(1) atoms to form a mixture of corner, edge, and face-sharing HTb4 tetrahedra.