TbGe2 crystallizes in the tetragonal I4_1/amd space group. Tb(1) is bonded to twelve equivalent Ge(1) atoms to form a mixture of distorted edge and face-sharing TbGe12 cuboctahedra. Ge(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ge(1) atoms.
TbGe2 crystallizes in the tetragonal I4_1/amd space group. Tb(1) is bonded to twelve equivalent Ge(1) atoms to form a mixture of distorted edge and face-sharing TbGe12 cuboctahedra. There are eight shorter (3.11 Å) and four longer (3.52 Å) Tb(1)-Ge(1) bond lengths. Ge(1) is bonded in a 9-coordinate geometry to six equivalent Tb(1) and three equivalent Ge(1) atoms. There are two shorter (2.55 Å) and one longer (2.62 Å) Ge(1)-Ge(1) bond length.