Ce3Sn3Ge2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 9-coordinate geometry to three equivalent Sn(1), three equivalent Sn(2), and three equivalent Ge(1) atoms. In the second Ce site, Ce(2) is bonded to six equivalent Sn(1) and six equivalent Ge(1) atoms to form face-sharing CeSn6Ge6 cuboctahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to three equivalent Ce(1), three equivalent Ce(2), and three equivalent Ge(1) atoms. In the second Sn site, Sn(2) is bonded to six equivalent Ce(1) atoms to form edge-sharing SnCe6 octahedra. Ge(1) is bonded in a 9-coordinate geometry to three equivalent Ce(1), three equivalent Ce(2), and three equivalent Sn(1) atoms.
Ce3Sn3Ge2 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 9-coordinate geometry to three equivalent Sn(1), three equivalent Sn(2), and three equivalent Ge(1) atoms. All Ce(1)-Sn(1) bond lengths are 3.32 Å. All Ce(1)-Sn(2) bond lengths are 3.20 Å. All Ce(1)-Ge(1) bond lengths are 3.46 Å. In the second Ce site, Ce(2) is bonded to six equivalent Sn(1) and six equivalent Ge(1) atoms to form face-sharing CeSn6Ge6 cuboctahedra. All Ce(2)-Sn(1) bond lengths are 3.43 Å. All Ce(2)-Ge(1) bond lengths are 3.30 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to three equivalent Ce(1), three equivalent Ce(2), and three equivalent Ge(1) atoms. All Sn(1)-Ge(1) bond lengths are 2.69 Å. In the second Sn site, Sn(2) is bonded to six equivalent Ce(1) atoms to form edge-sharing SnCe6 octahedra. Ge(1) is bonded in a 9-coordinate geometry to three equivalent Ce(1), three equivalent Ce(2), and three equivalent Sn(1) atoms.