Tb5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form corner-sharing TbGe6 octahedra. The corner-sharing octahedral tilt angles range from 52-54°. In the second Tb site, Tb(2) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(1), and three equivalent Ge(3) atoms. In the third Tb site, Tb(3) is bonded in a 6-coordinate geometry to one Ge(1), two equivalent Ge(2), and three equivalent Ge(3) atoms. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), four equivalent Tb(2), and one Ge(2) atom. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), four equivalent Tb(3), and one Ge(1) atom. In the third Ge site, Ge(3) is bonded in a 7-coordinate geometry to one Tb(1), three equivalent Tb(2), and three equivalent Tb(3) atoms.
Tb5Ge4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to two equivalent Ge(1), two equivalent Ge(2), and two equivalent Ge(3) atoms to form corner-sharing TbGe6 octahedra. The corner-sharing octahedral tilt angles range from 52-54°. There is one shorter (2.99 Å) and one longer (3.11 Å) Tb(1)-Ge(1) bond length. There is one shorter (2.98 Å) and one longer (3.10 Å) Tb(1)-Ge(2) bond length. Both Tb(1)-Ge(3) bond lengths are 3.02 Å. In the second Tb site, Tb(2) is bonded in a 6-coordinate geometry to one Ge(2), two equivalent Ge(1), and three equivalent Ge(3) atoms. The Tb(2)-Ge(2) bond length is 3.15 Å. There is one shorter (3.01 Å) and one longer (3.19 Å) Tb(2)-Ge(1) bond length. There are a spread of Tb(2)-Ge(3) bond distances ranging from 2.97-3.21 Å. In the third Tb site, Tb(3) is bonded in a 6-coordinate geometry to one Ge(1), two equivalent Ge(2), and three equivalent Ge(3) atoms. The Tb(3)-Ge(1) bond length is 3.05 Å. There is one shorter (3.03 Å) and one longer (3.08 Å) Tb(3)-Ge(2) bond length. There are a spread of Tb(3)-Ge(3) bond distances ranging from 2.90-2.99 Å. There are three inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), four equivalent Tb(2), and one Ge(2) atom. The Ge(1)-Ge(2) bond length is 2.73 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(2), four equivalent Tb(3), and one Ge(1) atom. In the third Ge site, Ge(3) is bonded in a 7-coordinate geometry to one Tb(1), three equivalent Tb(2), and three equivalent Tb(3) atoms.