Ce2Al3Sn is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Al(3), four equivalent Al(1), four equivalent Al(2), and two equivalent Sn(1) atoms to form CeAl10Sn2 cuboctahedra that share edges with four equivalent Ce(1)Al10Sn2 cuboctahedra, edges with eight equivalent Ce(2)Al8Sn4 cuboctahedra, faces with four equivalent Ce(1)Al10Sn2 cuboctahedra, and faces with four equivalent Ce(2)Al8Sn4 cuboctahedra. In the second Ce site, Ce(2) is bonded to two equivalent Al(1), two equivalent Al(2), four equivalent Al(3), and four equivalent Sn(1) atoms to form CeAl8Sn4 cuboctahedra that share edges with four equivalent Ce(2)Al8Sn4 cuboctahedra, edges with eight equivalent Ce(1)Al10Sn2 cuboctahedra, faces with four equivalent Ce(1)Al10Sn2 cuboctahedra, and faces with four equivalent Ce(2)Al8Sn4 cuboctahedra. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(1), one Al(2), and two equivalent Al(3) atoms. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(1), one Al(1), and two equivalent Sn(1) atoms. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to two equivalent Ce(1), four equivalent Ce(2), two equivalent Al(1), and one Sn(1) atom. Sn(1) is bonded in a 9-coordinate geometry to two equivalent Ce(1), four equivalent Ce(2), one Al(3), and two equivalent Al(2) atoms.
Ce2Al3Sn is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Al(3), four equivalent Al(1), four equivalent Al(2), and two equivalent Sn(1) atoms to form CeAl10Sn2 cuboctahedra that share edges with four equivalent Ce(1)Al10Sn2 cuboctahedra, edges with eight equivalent Ce(2)Al8Sn4 cuboctahedra, faces with four equivalent Ce(1)Al10Sn2 cuboctahedra, and faces with four equivalent Ce(2)Al8Sn4 cuboctahedra. Both Ce(1)-Al(3) bond lengths are 3.23 Å. All Ce(1)-Al(1) bond lengths are 3.32 Å. All Ce(1)-Al(2) bond lengths are 3.30 Å. Both Ce(1)-Sn(1) bond lengths are 3.37 Å. In the second Ce site, Ce(2) is bonded to two equivalent Al(1), two equivalent Al(2), four equivalent Al(3), and four equivalent Sn(1) atoms to form CeAl8Sn4 cuboctahedra that share edges with four equivalent Ce(2)Al8Sn4 cuboctahedra, edges with eight equivalent Ce(1)Al10Sn2 cuboctahedra, faces with four equivalent Ce(1)Al10Sn2 cuboctahedra, and faces with four equivalent Ce(2)Al8Sn4 cuboctahedra. Both Ce(2)-Al(1) bond lengths are 3.28 Å. Both Ce(2)-Al(2) bond lengths are 3.44 Å. All Ce(2)-Al(3) bond lengths are 3.35 Å. All Ce(2)-Sn(1) bond lengths are 3.33 Å. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(1), one Al(2), and two equivalent Al(3) atoms. The Al(1)-Al(2) bond length is 2.51 Å. Both Al(1)-Al(3) bond lengths are 2.54 Å. In the second Al site, Al(2) is bonded in a 9-coordinate geometry to two equivalent Ce(2), four equivalent Ce(1), one Al(1), and two equivalent Sn(1) atoms. Both Al(2)-Sn(1) bond lengths are 2.66 Å. In the third Al site, Al(3) is bonded in a 9-coordinate geometry to two equivalent Ce(1), four equivalent Ce(2), two equivalent Al(1), and one Sn(1) atom. The Al(3)-Sn(1) bond length is 2.67 Å. Sn(1) is bonded in a 9-coordinate geometry to two equivalent Ce(1), four equivalent Ce(2), one Al(3), and two equivalent Al(2) atoms.