TbBi3 crystallizes in the tetragonal I4/mmm space group. Tb(1) is bonded to four equivalent Bi(2) and eight equivalent Bi(1) atoms to form a mixture of face, corner, and edge-sharing TbBi12 cuboctahedra. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 12-coordinate geometry to four equivalent Tb(1), four equivalent Bi(1), and four equivalent Bi(2) atoms. In the second Bi site, Bi(2) is bonded in a square co-planar geometry to four equivalent Tb(1) and eight equivalent Bi(1) atoms.
TbBi3 crystallizes in the tetragonal I4/mmm space group. Tb(1) is bonded to four equivalent Bi(2) and eight equivalent Bi(1) atoms to form a mixture of face, corner, and edge-sharing TbBi12 cuboctahedra. All Tb(1)-Bi(2) bond lengths are 3.31 Å. All Tb(1)-Bi(1) bond lengths are 3.62 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 12-coordinate geometry to four equivalent Tb(1), four equivalent Bi(1), and four equivalent Bi(2) atoms. All Bi(1)-Bi(1) bond lengths are 3.31 Å. All Bi(1)-Bi(2) bond lengths are 3.62 Å. In the second Bi site, Bi(2) is bonded in a square co-planar geometry to four equivalent Tb(1) and eight equivalent Bi(1) atoms.