Ce2(TlSn)3 crystallizes in the orthorhombic Pmmm space group. Ce(1) is bonded to two equivalent Tl(1), two equivalent Tl(2), two equivalent Tl(3), two equivalent Sn(2), and four equivalent Sn(1) atoms to form CeTl6Sn6 cuboctahedra that share corners with twelve equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with four equivalent Tl(2)Ce4Sn8 cuboctahedra, edges with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, edges with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, edges with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with two equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with two equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, faces with two equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, and faces with six equivalent Ce(1)Tl6Sn6 cuboctahedra. There are three inequivalent Tl sites. In the first Tl site, Tl(1) is bonded to four equivalent Ce(1), four equivalent Tl(3), and four equivalent Sn(1) atoms to form TlCe4Tl4Sn4 cuboctahedra that share corners with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, corners with eight equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with eight equivalent Tl(2)Ce4Sn8 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, and faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra. In the second Tl site, Tl(2) is bonded to four equivalent Ce(1), four equivalent Sn(1), and four equivalent Sn(2) atoms to form TlCe4Sn8 cuboctahedra that share corners with four equivalent Tl(2)Ce4Sn8 cuboctahedra, corners with eight equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with eight equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with four equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, and faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra. In the third Tl site, Tl(3) is bonded to four equivalent Ce(1), four equivalent Tl(1), and four equivalent Sn(1) atoms to form TlCe4Tl4Sn4 cuboctahedra that share corners with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, corners with eight equivalent Tl(2)Ce4Sn8 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with eight equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, and faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to four equivalent Ce(1), two equivalent Tl(1), two equivalent Tl(2), two equivalent Tl(3), and two equivalent Sn(2) atoms to form distorted SnCe4Tl6Sn2 cuboctahedra that share corners with twelve equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, edges with four equivalent Tl(2)Ce4Sn8 cuboctahedra, edges with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, edges with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, edges with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with two equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with two equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with two equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, faces with two equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, and faces with six equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra. In the second Sn site, Sn(2) is bonded to four equivalent Ce(1), four equivalent Tl(2), and four equivalent Sn(1) atoms to form distorted SnCe4Tl4Sn4 cuboctahedra that share corners with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, corners with eight equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with eight equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with four equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, and faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra.
Ce2(TlSn)3 crystallizes in the orthorhombic Pmmm space group. Ce(1) is bonded to two equivalent Tl(1), two equivalent Tl(2), two equivalent Tl(3), two equivalent Sn(2), and four equivalent Sn(1) atoms to form CeTl6Sn6 cuboctahedra that share corners with twelve equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with four equivalent Tl(2)Ce4Sn8 cuboctahedra, edges with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, edges with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, edges with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with two equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with two equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, faces with two equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, and faces with six equivalent Ce(1)Tl6Sn6 cuboctahedra. Both Ce(1)-Tl(1) bond lengths are 3.44 Å. Both Ce(1)-Tl(2) bond lengths are 3.35 Å. Both Ce(1)-Tl(3) bond lengths are 3.45 Å. Both Ce(1)-Sn(2) bond lengths are 3.34 Å. All Ce(1)-Sn(1) bond lengths are 3.36 Å. There are three inequivalent Tl sites. In the first Tl site, Tl(1) is bonded to four equivalent Ce(1), four equivalent Tl(3), and four equivalent Sn(1) atoms to form TlCe4Tl4Sn4 cuboctahedra that share corners with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, corners with eight equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with eight equivalent Tl(2)Ce4Sn8 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, and faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra. All Tl(1)-Tl(3) bond lengths are 3.36 Å. All Tl(1)-Sn(1) bond lengths are 3.42 Å. In the second Tl site, Tl(2) is bonded to four equivalent Ce(1), four equivalent Sn(1), and four equivalent Sn(2) atoms to form TlCe4Sn8 cuboctahedra that share corners with four equivalent Tl(2)Ce4Sn8 cuboctahedra, corners with eight equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with eight equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with four equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, and faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra. All Tl(2)-Sn(1) bond lengths are 3.38 Å. All Tl(2)-Sn(2) bond lengths are 3.36 Å. In the third Tl site, Tl(3) is bonded to four equivalent Ce(1), four equivalent Tl(1), and four equivalent Sn(1) atoms to form TlCe4Tl4Sn4 cuboctahedra that share corners with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, corners with eight equivalent Tl(2)Ce4Sn8 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with eight equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, and faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra. All Tl(3)-Sn(1) bond lengths are 3.40 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to four equivalent Ce(1), two equivalent Tl(1), two equivalent Tl(2), two equivalent Tl(3), and two equivalent Sn(2) atoms to form distorted SnCe4Tl6Sn2 cuboctahedra that share corners with twelve equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, edges with four equivalent Tl(2)Ce4Sn8 cuboctahedra, edges with four equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, edges with four equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, edges with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with two equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with two equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with two equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, faces with two equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, and faces with six equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra. Both Sn(1)-Sn(2) bond lengths are 3.39 Å. In the second Sn site, Sn(2) is bonded to four equivalent Ce(1), four equivalent Tl(2), and four equivalent Sn(1) atoms to form distorted SnCe4Tl4Sn4 cuboctahedra that share corners with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, corners with eight equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Ce(1)Tl6Sn6 cuboctahedra, edges with eight equivalent Tl(3)Ce4Tl4Sn4 cuboctahedra, edges with eight equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra, faces with two equivalent Tl(1)Ce4Tl4Sn4 cuboctahedra, faces with four equivalent Ce(1)Tl6Sn6 cuboctahedra, faces with four equivalent Tl(2)Ce4Sn8 cuboctahedra, faces with four equivalent Sn(2)Ce4Tl4Sn4 cuboctahedra, and faces with four equivalent Sn(1)Ce4Tl6Sn2 cuboctahedra.