SmCo4Ag crystallizes in the hexagonal P-6m2 space group. Sm(1) is bonded in a distorted hexagonal planar geometry to three equivalent Co(1), twelve equivalent Co(2), and three equivalent Ag(1) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to three equivalent Sm(1), six equivalent Co(2), and three equivalent Ag(1) atoms to form distorted CoSm3Co6Ag3 cuboctahedra that share corners with nine equivalent Ag(1)Sm3Co9 cuboctahedra, corners with twelve equivalent Co(2)Sm4Co6Ag2 cuboctahedra, edges with six equivalent Co(1)Sm3Co6Ag3 cuboctahedra, faces with two equivalent Co(1)Sm3Co6Ag3 cuboctahedra, faces with three equivalent Ag(1)Sm3Co9 cuboctahedra, and faces with eighteen equivalent Co(2)Sm4Co6Ag2 cuboctahedra. In the second Co site, Co(2) is bonded to four equivalent Sm(1), two equivalent Co(1), four equivalent Co(2), and two equivalent Ag(1) atoms to form CoSm4Co6Ag2 cuboctahedra that share corners with four equivalent Co(1)Sm3Co6Ag3 cuboctahedra, corners with four equivalent Ag(1)Sm3Co9 cuboctahedra, corners with sixteen equivalent Co(2)Sm4Co6Ag2 cuboctahedra, edges with ten equivalent Co(2)Sm4Co6Ag2 cuboctahedra, faces with six equivalent Co(1)Sm3Co6Ag3 cuboctahedra, faces with six equivalent Ag(1)Sm3Co9 cuboctahedra, and faces with ten equivalent Co(2)Sm4Co6Ag2 cuboctahedra. Ag(1) is bonded to three equivalent Sm(1), three equivalent Co(1), and six equivalent Co(2) atoms to form distorted AgSm3Co9 cuboctahedra that share corners with nine equivalent Co(1)Sm3Co6Ag3 cuboctahedra, corners with twelve equivalent Co(2)Sm4Co6Ag2 cuboctahedra, edges with six equivalent Ag(1)Sm3Co9 cuboctahedra, faces with two equivalent Ag(1)Sm3Co9 cuboctahedra, faces with three equivalent Co(1)Sm3Co6Ag3 cuboctahedra, and faces with eighteen equivalent Co(2)Sm4Co6Ag2 cuboctahedra.
SmCo4Ag crystallizes in the hexagonal P-6m2 space group. Sm(1) is bonded in a distorted hexagonal planar geometry to three equivalent Co(1), twelve equivalent Co(2), and three equivalent Ag(1) atoms. All Sm(1)-Co(1) bond lengths are 2.95 Å. All Sm(1)-Co(2) bond lengths are 3.29 Å. All Sm(1)-Ag(1) bond lengths are 2.95 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to three equivalent Sm(1), six equivalent Co(2), and three equivalent Ag(1) atoms to form distorted CoSm3Co6Ag3 cuboctahedra that share corners with nine equivalent Ag(1)Sm3Co9 cuboctahedra, corners with twelve equivalent Co(2)Sm4Co6Ag2 cuboctahedra, edges with six equivalent Co(1)Sm3Co6Ag3 cuboctahedra, faces with two equivalent Co(1)Sm3Co6Ag3 cuboctahedra, faces with three equivalent Ag(1)Sm3Co9 cuboctahedra, and faces with eighteen equivalent Co(2)Sm4Co6Ag2 cuboctahedra. All Co(1)-Co(2) bond lengths are 2.50 Å. All Co(1)-Ag(1) bond lengths are 2.95 Å. In the second Co site, Co(2) is bonded to four equivalent Sm(1), two equivalent Co(1), four equivalent Co(2), and two equivalent Ag(1) atoms to form CoSm4Co6Ag2 cuboctahedra that share corners with four equivalent Co(1)Sm3Co6Ag3 cuboctahedra, corners with four equivalent Ag(1)Sm3Co9 cuboctahedra, corners with sixteen equivalent Co(2)Sm4Co6Ag2 cuboctahedra, edges with ten equivalent Co(2)Sm4Co6Ag2 cuboctahedra, faces with six equivalent Co(1)Sm3Co6Ag3 cuboctahedra, faces with six equivalent Ag(1)Sm3Co9 cuboctahedra, and faces with ten equivalent Co(2)Sm4Co6Ag2 cuboctahedra. There are two shorter (2.42 Å) and two longer (2.69 Å) Co(2)-Co(2) bond lengths. Both Co(2)-Ag(1) bond lengths are 2.59 Å. Ag(1) is bonded to three equivalent Sm(1), three equivalent Co(1), and six equivalent Co(2) atoms to form distorted AgSm3Co9 cuboctahedra that share corners with nine equivalent Co(1)Sm3Co6Ag3 cuboctahedra, corners with twelve equivalent Co(2)Sm4Co6Ag2 cuboctahedra, edges with six equivalent Ag(1)Sm3Co9 cuboctahedra, faces with two equivalent Ag(1)Sm3Co9 cuboctahedra, faces with three equivalent Co(1)Sm3Co6Ag3 cuboctahedra, and faces with eighteen equivalent Co(2)Sm4Co6Ag2 cuboctahedra.