Tb5Au2Sb 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 Sb(1) atoms to form corner-sharing TbSb2Au4 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 Sb(1) atoms. Au(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1) and six equivalent Tb(2) atoms. Sb(1) is bonded in a distorted q6 geometry to two equivalent Tb(1) and eight equivalent Tb(2) atoms.
Tb5Au2Sb 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 Sb(1) atoms to form corner-sharing TbSb2Au4 octahedra. The corner-sharing octahedral tilt angles range from 0-49°. All Tb(1)-Au(1) bond lengths are 3.17 Å. Both Tb(1)-Sb(1) bond lengths are 3.26 Å. In the second Tb site, Tb(2) is bonded in a 5-coordinate geometry to three equivalent Au(1) and two equivalent Sb(1) atoms. There is one shorter (3.02 Å) and two longer (3.03 Å) Tb(2)-Au(1) bond lengths. Both Tb(2)-Sb(1) bond lengths are 3.38 Å. Au(1) is bonded in a 8-coordinate geometry to two equivalent Tb(1) and six equivalent Tb(2) atoms. Sb(1) is bonded in a distorted q6 geometry to two equivalent Tb(1) and eight equivalent Tb(2) atoms.