Ta5Ge3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 5-coordinate geometry to two equivalent Ge(2) and three equivalent Ge(1) atoms. In the second Ta site, Ta(2) is bonded to two equivalent Ge(2) and four equivalent Ge(1) atoms to form distorted corner-sharing TaGe6 octahedra. The corner-sharing octahedral tilt angles range from 0-49°. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Ta(2), six equivalent Ta(1), and one Ge(1) atom. In the second Ge site, Ge(2) is bonded in a 10-coordinate geometry to two equivalent Ta(2) and eight equivalent Ta(1) atoms.
Ta5Ge3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 5-coordinate geometry to two equivalent Ge(2) and three equivalent Ge(1) atoms. Both Ta(1)-Ge(2) bond lengths are 2.75 Å. There is one shorter (2.66 Å) and two longer (2.71 Å) Ta(1)-Ge(1) bond lengths. In the second Ta site, Ta(2) is bonded to two equivalent Ge(2) and four equivalent Ge(1) atoms to form distorted corner-sharing TaGe6 octahedra. The corner-sharing octahedral tilt angles range from 0-49°. Both Ta(2)-Ge(2) bond lengths are 3.00 Å. All Ta(2)-Ge(1) bond lengths are 2.58 Å. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 9-coordinate geometry to two equivalent Ta(2), six equivalent Ta(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.55 Å. In the second Ge site, Ge(2) is bonded in a 10-coordinate geometry to two equivalent Ta(2) and eight equivalent Ta(1) atoms.