Sm2(InSn)3 is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Pmmm space group. Sm(1) is bonded to two equivalent In(2), four equivalent In(1), two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(3) atoms to form SmIn6Sn6 cuboctahedra that share corners with twelve equivalent Sm(1)In6Sn6 cuboctahedra, edges with four equivalent In(2)Sm4In4Sn4 cuboctahedra, edges with four equivalent Sn(2)Sm4In8 cuboctahedra, edges with eight equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with two equivalent In(2)Sm4In4Sn4 cuboctahedra, faces with two equivalent Sn(2)Sm4In8 cuboctahedra, faces with four equivalent In(1)Sm4In2Sn6 cuboctahedra, and faces with six equivalent Sm(1)In6Sn6 cuboctahedra. There are two inequivalent In sites. In the first In site, In(1) is bonded to four equivalent Sm(1), two equivalent In(2), two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(3) atoms to form InSm4In2Sn6 cuboctahedra that share corners with twelve equivalent In(1)Sm4In2Sn6 cuboctahedra, edges with four equivalent In(2)Sm4In4Sn4 cuboctahedra, edges with four equivalent Sn(2)Sm4In8 cuboctahedra, edges with eight equivalent Sm(1)In6Sn6 cuboctahedra, faces with two equivalent In(2)Sm4In4Sn4 cuboctahedra, faces with two equivalent Sn(2)Sm4In8 cuboctahedra, faces with four equivalent Sm(1)In6Sn6 cuboctahedra, and faces with six equivalent In(1)Sm4In2Sn6 cuboctahedra. In the second In site, In(2) is bonded to four equivalent Sm(1), four equivalent In(1), and four equivalent Sn(2) atoms to form distorted InSm4In4Sn4 cuboctahedra that share corners with four equivalent In(2)Sm4In4Sn4 cuboctahedra, edges with eight equivalent Sm(1)In6Sn6 cuboctahedra, edges with eight equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with four equivalent Sm(1)In6Sn6 cuboctahedra, faces with four equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with four equivalent In(2)Sm4In4Sn4 cuboctahedra, and faces with four equivalent Sn(2)Sm4In8 cuboctahedra. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to four equivalent Sm(1), four equivalent In(1), and four equivalent Sn(3) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Sm(1), four equivalent In(1), and four equivalent In(2) atoms to form SnSm4In8 cuboctahedra that share corners with four equivalent Sn(2)Sm4In8 cuboctahedra, edges with eight equivalent Sm(1)In6Sn6 cuboctahedra, edges with eight equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with four equivalent Sm(1)In6Sn6 cuboctahedra, faces with four equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with four equivalent In(2)Sm4In4Sn4 cuboctahedra, and faces with four equivalent Sn(2)Sm4In8 cuboctahedra. In the third Sn site, Sn(3) is bonded in a 12-coordinate geometry to four equivalent Sm(1), four equivalent In(1), and four equivalent Sn(1) atoms.
Sm2(InSn)3 is beta Cu3Ti-derived structured and crystallizes in the orthorhombic Pmmm space group. Sm(1) is bonded to two equivalent In(2), four equivalent In(1), two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(3) atoms to form SmIn6Sn6 cuboctahedra that share corners with twelve equivalent Sm(1)In6Sn6 cuboctahedra, edges with four equivalent In(2)Sm4In4Sn4 cuboctahedra, edges with four equivalent Sn(2)Sm4In8 cuboctahedra, edges with eight equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with two equivalent In(2)Sm4In4Sn4 cuboctahedra, faces with two equivalent Sn(2)Sm4In8 cuboctahedra, faces with four equivalent In(1)Sm4In2Sn6 cuboctahedra, and faces with six equivalent Sm(1)In6Sn6 cuboctahedra. Both Sm(1)-In(2) bond lengths are 3.33 Å. All Sm(1)-In(1) bond lengths are 3.38 Å. Both Sm(1)-Sn(1) bond lengths are 3.29 Å. Both Sm(1)-Sn(2) bond lengths are 3.30 Å. Both Sm(1)-Sn(3) bond lengths are 3.27 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded to four equivalent Sm(1), two equivalent In(2), two equivalent Sn(1), two equivalent Sn(2), and two equivalent Sn(3) atoms to form InSm4In2Sn6 cuboctahedra that share corners with twelve equivalent In(1)Sm4In2Sn6 cuboctahedra, edges with four equivalent In(2)Sm4In4Sn4 cuboctahedra, edges with four equivalent Sn(2)Sm4In8 cuboctahedra, edges with eight equivalent Sm(1)In6Sn6 cuboctahedra, faces with two equivalent In(2)Sm4In4Sn4 cuboctahedra, faces with two equivalent Sn(2)Sm4In8 cuboctahedra, faces with four equivalent Sm(1)In6Sn6 cuboctahedra, and faces with six equivalent In(1)Sm4In2Sn6 cuboctahedra. Both In(1)-In(2) bond lengths are 3.27 Å. Both In(1)-Sn(1) bond lengths are 3.30 Å. Both In(1)-Sn(2) bond lengths are 3.30 Å. Both In(1)-Sn(3) bond lengths are 3.33 Å. In the second In site, In(2) is bonded to four equivalent Sm(1), four equivalent In(1), and four equivalent Sn(2) atoms to form distorted InSm4In4Sn4 cuboctahedra that share corners with four equivalent In(2)Sm4In4Sn4 cuboctahedra, edges with eight equivalent Sm(1)In6Sn6 cuboctahedra, edges with eight equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with four equivalent Sm(1)In6Sn6 cuboctahedra, faces with four equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with four equivalent In(2)Sm4In4Sn4 cuboctahedra, and faces with four equivalent Sn(2)Sm4In8 cuboctahedra. All In(2)-Sn(2) bond lengths are 3.38 Å. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to four equivalent Sm(1), four equivalent In(1), and four equivalent Sn(3) atoms. All Sn(1)-Sn(3) bond lengths are 3.38 Å. In the second Sn site, Sn(2) is bonded to four equivalent Sm(1), four equivalent In(1), and four equivalent In(2) atoms to form SnSm4In8 cuboctahedra that share corners with four equivalent Sn(2)Sm4In8 cuboctahedra, edges with eight equivalent Sm(1)In6Sn6 cuboctahedra, edges with eight equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with four equivalent Sm(1)In6Sn6 cuboctahedra, faces with four equivalent In(1)Sm4In2Sn6 cuboctahedra, faces with four equivalent In(2)Sm4In4Sn4 cuboctahedra, and faces with four equivalent Sn(2)Sm4In8 cuboctahedra. In the third Sn site, Sn(3) is bonded in a 12-coordinate geometry to four equivalent Sm(1), four equivalent In(1), and four equivalent Sn(1) atoms.