Sm2(Co3In)3 crystallizes in the triclinic P1 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 13-coordinate geometry to one Co(5), two equivalent Co(3), two equivalent Co(4), two equivalent Co(9), two equivalent In(1), and four equivalent In(2) atoms. In the second Sm site, Sm(2) is bonded in a 13-coordinate geometry to one Co(7), two equivalent Co(1), two equivalent Co(2), two equivalent Co(8), two equivalent In(2), and four equivalent In(1) atoms. There are nine inequivalent Co sites. In the first Co site, Co(1) is bonded in a 11-coordinate geometry to two equivalent Sm(2), two equivalent Co(2), two equivalent Co(7), two equivalent Co(8), one In(3), and two equivalent In(1) atoms. In the second Co site, Co(2) is bonded to two equivalent Sm(2), one Co(6), two equivalent Co(1), two equivalent Co(7), two equivalent Co(8), one In(1), and two equivalent In(3) atoms to form distorted CoSm2In3Co7 cuboctahedra that share corners with two equivalent Co(6)In4Co8 cuboctahedra, corners with two equivalent Co(2)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(4)Sm2In3Co7 cuboctahedra, corners with three equivalent Co(9)Sm2In3Co7 cuboctahedra,  an edgeedge with one Co(9)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with four equivalent Co(8)Sm2In3Co7 cuboctahedra,  a faceface with one Co(4)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(2)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(8)Sm2In3Co7 cuboctahedra. In the third Co site, Co(3) is bonded in a 11-coordinate geometry to two equivalent Sm(1), two equivalent Co(4), two equivalent Co(5), two equivalent Co(9), one In(3), and two equivalent In(2) atoms. In the fourth Co site, Co(4) is bonded to two equivalent Sm(1), one Co(6), two equivalent Co(3), two equivalent Co(5), two equivalent Co(9), one In(2), and two equivalent In(3) atoms to form distorted CoSm2In3Co7 cuboctahedra that share corners with two equivalent Co(6)In4Co8 cuboctahedra, corners with two equivalent Co(2)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(4)Sm2In3Co7 cuboctahedra, corners with three equivalent Co(8)Sm2In3Co7 cuboctahedra,  an edgeedge with one Co(8)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with four equivalent Co(9)Sm2In3Co7 cuboctahedra,  a faceface with one Co(2)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(4)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(9)Sm2In3Co7 cuboctahedra. In the fifth Co site, Co(5) is bonded in a 1-coordinate geometry to one Sm(1), two equivalent Co(3), two equivalent Co(4), two equivalent Co(6), two equivalent Co(9), and two equivalent In(3) atoms. In the sixth Co site, Co(6) is bonded to one Co(2), one Co(4), one Co(8), one Co(9), two equivalent Co(5), two equivalent Co(7), and four equivalent In(3) atoms to form distorted CoIn4Co8 cuboctahedra that share corners with two equivalent Co(2)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(4)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(8)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(9)Sm2In3Co7 cuboctahedra, corners with four equivalent Co(6)In4Co8 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with two equivalent Co(2)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(4)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(8)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(9)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(2)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(4)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(8)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(9)Sm2In3Co7 cuboctahedra. In the seventh Co site, Co(7) is bonded in a 1-coordinate geometry to one Sm(2), two equivalent Co(1), two equivalent Co(2), two equivalent Co(6), two equivalent Co(8), and two equivalent In(3) atoms. In the eighth Co site, Co(8) is bonded to two equivalent Sm(2), one Co(6), two equivalent Co(1), two equivalent Co(2), two equivalent Co(7), one In(1), and two equivalent In(3) atoms to form distorted CoSm2In3Co7 cuboctahedra that share corners with two equivalent Co(6)In4Co8 cuboctahedra, corners with two equivalent Co(8)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(9)Sm2In3Co7 cuboctahedra, corners with three equivalent Co(4)Sm2In3Co7 cuboctahedra,  an edgeedge with one Co(4)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with four equivalent Co(2)Sm2In3Co7 cuboctahedra,  a faceface with one Co(9)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(2)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(8)Sm2In3Co7 cuboctahedra. In the ninth Co site, Co(9) is bonded to two equivalent Sm(1), one Co(6), two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), one In(2), and two equivalent In(3) atoms to form distorted CoSm2In3Co7 cuboctahedra that share corners with two equivalent Co(6)In4Co8 cuboctahedra, corners with two equivalent Co(8)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(9)Sm2In3Co7 cuboctahedra, corners with three equivalent Co(2)Sm2In3Co7 cuboctahedra,  an edgeedge with one Co(2)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with four equivalent Co(4)Sm2In3Co7 cuboctahedra,  a faceface with one Co(8)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(4)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(9)Sm2In3Co7 cuboctahedra. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 12-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), one Co(2), one Co(8), two equivalent Co(1), and two equivalent In(2) atoms. In the second In site, In(2) is bonded in a 12-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), one Co(4), one Co(9), two equivalent Co(3), and two equivalent In(1) atoms. In the third In site, In(3) is bonded in a 18-coordinate geometry to one Co(1), one Co(3), two equivalent Co(2), two equivalent Co(4), two equivalent Co(5), two equivalent Co(7), two equivalent Co(8), two equivalent Co(9), and four equivalent Co(6) atoms.
Sm2(Co3In)3 crystallizes in the triclinic P1 space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 13-coordinate geometry to one Co(5), two equivalent Co(3), two equivalent Co(4), two equivalent Co(9), two equivalent In(1), and four equivalent In(2) atoms. The Sm(1)-Co(5) bond length is 2.66 Å. There is one shorter (2.80 Å) and one longer (2.84 Å) Sm(1)-Co(3) bond length. There is one shorter (3.08 Å) and one longer (3.11 Å) Sm(1)-Co(4) bond length. There is one shorter (3.10 Å) and one longer (3.14 Å) Sm(1)-Co(9) bond length. Both Sm(1)-In(1) bond lengths are 3.28 Å. There are a spread of Sm(1)-In(2) bond distances ranging from 3.19-3.22 Å. In the second Sm site, Sm(2) is bonded in a 13-coordinate geometry to one Co(7), two equivalent Co(1), two equivalent Co(2), two equivalent Co(8), two equivalent In(2), and four equivalent In(1) atoms. The Sm(2)-Co(7) bond length is 2.67 Å. There is one shorter (2.80 Å) and one longer (2.84 Å) Sm(2)-Co(1) bond length. Both Sm(2)-Co(2) bond lengths are 3.08 Å. There is one shorter (3.09 Å) and one longer (3.11 Å) Sm(2)-Co(8) bond length. There is one shorter (3.29 Å) and one longer (3.30 Å) Sm(2)-In(2) bond length. There are two shorter (3.20 Å) and two longer (3.21 Å) Sm(2)-In(1) bond lengths. There are nine inequivalent Co sites. In the first Co site, Co(1) is bonded in a 11-coordinate geometry to two equivalent Sm(2), two equivalent Co(2), two equivalent Co(7), two equivalent Co(8), one In(3), and two equivalent In(1) atoms. Both Co(1)-Co(2) bond lengths are 2.43 Å. There is one shorter (2.75 Å) and one longer (2.77 Å) Co(1)-Co(7) bond length. There is one shorter (2.40 Å) and one longer (2.43 Å) Co(1)-Co(8) bond length. The Co(1)-In(3) bond length is 2.65 Å. There is one shorter (2.73 Å) and one longer (2.74 Å) Co(1)-In(1) bond length. In the second Co site, Co(2) is bonded to two equivalent Sm(2), one Co(6), two equivalent Co(1), two equivalent Co(7), two equivalent Co(8), one In(1), and two equivalent In(3) atoms to form distorted CoSm2In3Co7 cuboctahedra that share corners with two equivalent Co(6)In4Co8 cuboctahedra, corners with two equivalent Co(2)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(4)Sm2In3Co7 cuboctahedra, corners with three equivalent Co(9)Sm2In3Co7 cuboctahedra,  an edgeedge with one Co(9)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with four equivalent Co(8)Sm2In3Co7 cuboctahedra,  a faceface with one Co(4)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(2)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(8)Sm2In3Co7 cuboctahedra. The Co(2)-Co(6) bond length is 2.38 Å. There is one shorter (2.46 Å) and one longer (2.48 Å) Co(2)-Co(7) bond length. There is one shorter (2.42 Å) and one longer (2.48 Å) Co(2)-Co(8) bond length. The Co(2)-In(1) bond length is 2.74 Å. There is one shorter (3.12 Å) and one longer (3.13 Å) Co(2)-In(3) bond length. In the third Co site, Co(3) is bonded in a 11-coordinate geometry to two equivalent Sm(1), two equivalent Co(4), two equivalent Co(5), two equivalent Co(9), one In(3), and two equivalent In(2) atoms. There is one shorter (2.42 Å) and one longer (2.43 Å) Co(3)-Co(4) bond length. There is one shorter (2.75 Å) and one longer (2.77 Å) Co(3)-Co(5) bond length. There is one shorter (2.41 Å) and one longer (2.42 Å) Co(3)-Co(9) bond length. The Co(3)-In(3) bond length is 2.62 Å. There is one shorter (2.71 Å) and one longer (2.73 Å) Co(3)-In(2) bond length. In the fourth Co site, Co(4) is bonded to two equivalent Sm(1), one Co(6), two equivalent Co(3), two equivalent Co(5), two equivalent Co(9), one In(2), and two equivalent In(3) atoms to form distorted CoSm2In3Co7 cuboctahedra that share corners with two equivalent Co(6)In4Co8 cuboctahedra, corners with two equivalent Co(2)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(4)Sm2In3Co7 cuboctahedra, corners with three equivalent Co(8)Sm2In3Co7 cuboctahedra,  an edgeedge with one Co(8)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with four equivalent Co(9)Sm2In3Co7 cuboctahedra,  a faceface with one Co(2)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(4)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(9)Sm2In3Co7 cuboctahedra. The Co(4)-Co(6) bond length is 2.41 Å. There is one shorter (2.46 Å) and one longer (2.47 Å) Co(4)-Co(5) bond length. There is one shorter (2.39 Å) and one longer (2.51 Å) Co(4)-Co(9) bond length. The Co(4)-In(2) bond length is 2.73 Å. There is one shorter (3.08 Å) and one longer (3.09 Å) Co(4)-In(3) bond length. In the fifth Co site, Co(5) is bonded in a 1-coordinate geometry to one Sm(1), two equivalent Co(3), two equivalent Co(4), two equivalent Co(6), two equivalent Co(9), and two equivalent In(3) atoms. Both Co(5)-Co(6) bond lengths are 2.44 Å. There is one shorter (2.45 Å) and one longer (2.48 Å) Co(5)-Co(9) bond length. There is one shorter (2.79 Å) and one longer (2.80 Å) Co(5)-In(3) bond length. In the sixth Co site, Co(6) is bonded to one Co(2), one Co(4), one Co(8), one Co(9), two equivalent Co(5), two equivalent Co(7), and four equivalent In(3) atoms to form distorted CoIn4Co8 cuboctahedra that share corners with two equivalent Co(2)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(4)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(8)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(9)Sm2In3Co7 cuboctahedra, corners with four equivalent Co(6)In4Co8 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with two equivalent Co(2)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(4)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(8)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(9)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(2)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(4)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(8)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(9)Sm2In3Co7 cuboctahedra. The Co(6)-Co(8) bond length is 2.39 Å. The Co(6)-Co(9) bond length is 2.39 Å. There is one shorter (2.41 Å) and one longer (2.44 Å) Co(6)-Co(7) bond length. There are a spread of Co(6)-In(3) bond distances ranging from 3.16-3.19 Å. In the seventh Co site, Co(7) is bonded in a 1-coordinate geometry to one Sm(2), two equivalent Co(1), two equivalent Co(2), two equivalent Co(6), two equivalent Co(8), and two equivalent In(3) atoms. There is one shorter (2.46 Å) and one longer (2.47 Å) Co(7)-Co(8) bond length. There is one shorter (2.80 Å) and one longer (2.82 Å) Co(7)-In(3) bond length. In the eighth Co site, Co(8) is bonded to two equivalent Sm(2), one Co(6), two equivalent Co(1), two equivalent Co(2), two equivalent Co(7), one In(1), and two equivalent In(3) atoms to form distorted CoSm2In3Co7 cuboctahedra that share corners with two equivalent Co(6)In4Co8 cuboctahedra, corners with two equivalent Co(8)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(9)Sm2In3Co7 cuboctahedra, corners with three equivalent Co(4)Sm2In3Co7 cuboctahedra,  an edgeedge with one Co(4)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with four equivalent Co(2)Sm2In3Co7 cuboctahedra,  a faceface with one Co(9)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(2)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(8)Sm2In3Co7 cuboctahedra. The Co(8)-In(1) bond length is 2.70 Å. There is one shorter (3.12 Å) and one longer (3.14 Å) Co(8)-In(3) bond length. In the ninth Co site, Co(9) is bonded to two equivalent Sm(1), one Co(6), two equivalent Co(3), two equivalent Co(4), two equivalent Co(5), one In(2), and two equivalent In(3) atoms to form distorted CoSm2In3Co7 cuboctahedra that share corners with two equivalent Co(6)In4Co8 cuboctahedra, corners with two equivalent Co(8)Sm2In3Co7 cuboctahedra, corners with two equivalent Co(9)Sm2In3Co7 cuboctahedra, corners with three equivalent Co(2)Sm2In3Co7 cuboctahedra,  an edgeedge with one Co(2)Sm2In3Co7 cuboctahedra, edges with two equivalent Co(6)In4Co8 cuboctahedra, edges with four equivalent Co(4)Sm2In3Co7 cuboctahedra,  a faceface with one Co(8)Sm2In3Co7 cuboctahedra, faces with two equivalent Co(6)In4Co8 cuboctahedra, faces with two equivalent Co(4)Sm2In3Co7 cuboctahedra, and faces with two equivalent Co(9)Sm2In3Co7 cuboctahedra. The Co(9)-In(2) bond length is 2.70 Å. Both Co(9)-In(3) bond lengths are 3.09 Å. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 12-coordinate geometry to two equivalent Sm(1), four equivalent Sm(2), one Co(2), one Co(8), two equivalent Co(1), and two equivalent In(2) atoms. There is one shorter (3.26 Å) and one longer (3.27 Å) In(1)-In(2) bond length. In the second In site, In(2) is bonded in a 12-coordinate geometry to two equivalent Sm(2), four equivalent Sm(1), one Co(4), one Co(9), two equivalent Co(3), and two equivalent In(1) atoms. In the third In site, In(3) is bonded in a 18-coordinate geometry to one Co(1), one Co(3), two equivalent Co(2), two equivalent Co(4), two equivalent Co(5), two equivalent Co(7), two equivalent Co(8), two equivalent Co(9), and four equivalent Co(6) atoms.