Tb5Au2Bi crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Au(1) and two equivalent Bi(1) atoms to form corner-sharing TbBi2Au4 octahedra. The corner-sharing octahedral tilt angles range from 0-49°. In the second Tb site, Tb(2) is bonded in a 5-coordinate geometry to three equivalent Au(1) and two equivalent Bi(1) atoms. Au(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1) and six equivalent Tb(2) atoms. Bi(1) is bonded in a distorted q6 geometry to two equivalent Tb(1) and eight equivalent Tb(2) atoms.
Tb5Au2Bi crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Au(1) and two equivalent Bi(1) atoms to form corner-sharing TbBi2Au4 octahedra. The corner-sharing octahedral tilt angles range from 0-49°. All Tb(1)-Au(1) bond lengths are 3.18 Å. Both Tb(1)-Bi(1) bond lengths are 3.30 Å. In the second Tb site, Tb(2) is bonded in a 5-coordinate geometry to three equivalent Au(1) and two equivalent Bi(1) atoms. There is one shorter (3.03 Å) and two longer (3.04 Å) Tb(2)-Au(1) bond lengths. Both Tb(2)-Bi(1) bond lengths are 3.42 Å. Au(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1) and six equivalent Tb(2) atoms. Bi(1) is bonded in a distorted q6 geometry to two equivalent Tb(1) and eight equivalent Tb(2) atoms.