Tb3Ge5 crystallizes in the hexagonal P-62c space group. Tb(1) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(3), and six equivalent Ge(2) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ge(2) atoms. In the second Ge site, Ge(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ge(2) atoms. In the third Ge site, Ge(2) is bonded in a 8-coordinate geometry to six equivalent Tb(1), one Ge(1), and one Ge(3) atom.
Tb3Ge5 crystallizes in the hexagonal P-62c space group. Tb(1) is bonded in a 10-coordinate geometry to two equivalent Ge(1), two equivalent Ge(3), and six equivalent Ge(2) atoms. Both Tb(1)-Ge(1) bond lengths are 3.10 Å. Both Tb(1)-Ge(3) bond lengths are 3.10 Å. There are a spread of Tb(1)-Ge(2) bond distances ranging from 2.95-3.45 Å. There are three inequivalent Ge sites. In the first Ge site, Ge(3) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ge(2) atoms. All Ge(3)-Ge(2) bond lengths are 2.57 Å. In the second Ge site, Ge(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ge(2) atoms. All Ge(1)-Ge(2) bond lengths are 2.54 Å. In the third Ge site, Ge(2) is bonded in a 8-coordinate geometry to six equivalent Tb(1), one Ge(1), and one Ge(3) atom.