Tb5BGe3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 6-coordinate geometry to six equivalent Ge(1) atoms. In the second Tb site, Tb(2) is bonded in a 7-coordinate geometry to two equivalent B(1) and five equivalent Ge(1) atoms. B(1) is bonded to six equivalent Tb(2) atoms to form face-sharing BTb6 octahedra. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Tb(1) and five equivalent Tb(2) atoms.
Tb5BGe3 crystallizes in the hexagonal P6_3/mcm space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 6-coordinate geometry to six equivalent Ge(1) atoms. All Tb(1)-Ge(1) bond lengths are 3.08 Å. In the second Tb site, Tb(2) is bonded in a 7-coordinate geometry to two equivalent B(1) and five equivalent Ge(1) atoms. Both Tb(2)-B(1) bond lengths are 2.60 Å. There are a spread of Tb(2)-Ge(1) bond distances ranging from 3.00-3.52 Å. B(1) is bonded to six equivalent Tb(2) atoms to form face-sharing BTb6 octahedra. Ge(1) is bonded in a 9-coordinate geometry to four equivalent Tb(1) and five equivalent Tb(2) atoms.