Tb3Ce is Magnesium-derived structured and crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to six equivalent Tb(1) and six equivalent Tb(2) atoms to form TbTb12 cuboctahedra that share corners with six equivalent Tb(1)Tb12 cuboctahedra, corners with twelve equivalent Ce(1)Tb6Ce6 cuboctahedra, edges with six equivalent Tb(1)Tb12 cuboctahedra, edges with twelve equivalent Tb(2)Tb9Ce3 cuboctahedra, faces with two equivalent Ce(1)Tb6Ce6 cuboctahedra, faces with six equivalent Tb(1)Tb12 cuboctahedra, and faces with twelve equivalent Tb(2)Tb9Ce3 cuboctahedra. In the second Tb site, Tb(2) is bonded to three equivalent Tb(1), six equivalent Tb(2), and three equivalent Ce(1) atoms to form TbTb9Ce3 cuboctahedra that share corners with eighteen equivalent Tb(2)Tb9Ce3 cuboctahedra, edges with six equivalent Tb(1)Tb12 cuboctahedra, edges with six equivalent Tb(2)Tb9Ce3 cuboctahedra, edges with six equivalent Ce(1)Tb6Ce6 cuboctahedra, faces with six equivalent Tb(1)Tb12 cuboctahedra, faces with six equivalent Ce(1)Tb6Ce6 cuboctahedra, and faces with eight equivalent Tb(2)Tb9Ce3 cuboctahedra. Ce(1) is bonded to six equivalent Tb(2) and six equivalent Ce(1) atoms to form CeTb6Ce6 cuboctahedra that share corners with six equivalent Ce(1)Tb6Ce6 cuboctahedra, corners with twelve equivalent Tb(1)Tb12 cuboctahedra, edges with six equivalent Ce(1)Tb6Ce6 cuboctahedra, edges with twelve equivalent Tb(2)Tb9Ce3 cuboctahedra, faces with two equivalent Tb(1)Tb12 cuboctahedra, faces with six equivalent Ce(1)Tb6Ce6 cuboctahedra, and faces with twelve equivalent Tb(2)Tb9Ce3 cuboctahedra.
Tb3Ce is Magnesium-derived structured and crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to six equivalent Tb(1) and six equivalent Tb(2) atoms to form TbTb12 cuboctahedra that share corners with six equivalent Tb(1)Tb12 cuboctahedra, corners with twelve equivalent Ce(1)Tb6Ce6 cuboctahedra, edges with six equivalent Tb(1)Tb12 cuboctahedra, edges with twelve equivalent Tb(2)Tb9Ce3 cuboctahedra, faces with two equivalent Ce(1)Tb6Ce6 cuboctahedra, faces with six equivalent Tb(1)Tb12 cuboctahedra, and faces with twelve equivalent Tb(2)Tb9Ce3 cuboctahedra. All Tb(1)-Tb(1) bond lengths are 3.61 Å. All Tb(1)-Tb(2) bond lengths are 3.54 Å. In the second Tb site, Tb(2) is bonded to three equivalent Tb(1), six equivalent Tb(2), and three equivalent Ce(1) atoms to form TbTb9Ce3 cuboctahedra that share corners with eighteen equivalent Tb(2)Tb9Ce3 cuboctahedra, edges with six equivalent Tb(1)Tb12 cuboctahedra, edges with six equivalent Tb(2)Tb9Ce3 cuboctahedra, edges with six equivalent Ce(1)Tb6Ce6 cuboctahedra, faces with six equivalent Tb(1)Tb12 cuboctahedra, faces with six equivalent Ce(1)Tb6Ce6 cuboctahedra, and faces with eight equivalent Tb(2)Tb9Ce3 cuboctahedra. All Tb(2)-Tb(2) bond lengths are 3.61 Å. All Tb(2)-Ce(1) bond lengths are 3.61 Å. Ce(1) is bonded to six equivalent Tb(2) and six equivalent Ce(1) atoms to form CeTb6Ce6 cuboctahedra that share corners with six equivalent Ce(1)Tb6Ce6 cuboctahedra, corners with twelve equivalent Tb(1)Tb12 cuboctahedra, edges with six equivalent Ce(1)Tb6Ce6 cuboctahedra, edges with twelve equivalent Tb(2)Tb9Ce3 cuboctahedra, faces with two equivalent Tb(1)Tb12 cuboctahedra, faces with six equivalent Ce(1)Tb6Ce6 cuboctahedra, and faces with twelve equivalent Tb(2)Tb9Ce3 cuboctahedra. All Ce(1)-Ce(1) bond lengths are 3.61 Å.