Th3Ge2 crystallizes in the tetragonal P4/mbm space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 6-coordinate geometry to six equivalent Ge(1) atoms. In the second Th site, Th(2) is bonded in a square co-planar geometry to four equivalent Ge(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Th(2), six equivalent Th(1), and one Ge(1) atom.
Th3Ge2 crystallizes in the tetragonal P4/mbm space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 6-coordinate geometry to six equivalent Ge(1) atoms. There are two shorter (3.09 Å) and four longer (3.20 Å) Th(1)-Ge(1) bond lengths. In the second Th site, Th(2) is bonded in a square co-planar geometry to four equivalent Ge(1) atoms. All Th(2)-Ge(1) bond lengths are 3.18 Å. Ge(1) is bonded in a 9-coordinate geometry to two equivalent Th(2), six equivalent Th(1), and one Ge(1) atom. The Ge(1)-Ge(1) bond length is 2.72 Å.