SmGaSb2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. Sm(1) is bonded to two equivalent Sb(2) and four equivalent Sb(1) atoms to form SmSb6 octahedra that share corners with six equivalent Sm(1)Sb6 octahedra, edges with four equivalent Sm(1)Sb6 octahedra, and edges with eight equivalent Ga(1)Sb6 octahedra. The corner-sharing octahedra are not tilted. Ga(1) is bonded to two equivalent Sb(1) and four equivalent Sb(2) atoms to form GaSb6 octahedra that share corners with six equivalent Ga(1)Sb6 octahedra, edges with four equivalent Ga(1)Sb6 octahedra, and edges with eight equivalent Sm(1)Sb6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to four equivalent Sm(1) and two equivalent Ga(1) atoms to form SbSm4Ga2 octahedra that share corners with six equivalent Sb(1)Sm4Ga2 octahedra, edges with four equivalent Sb(1)Sm4Ga2 octahedra, and edges with eight equivalent Sb(2)Sm2Ga4 octahedra. The corner-sharing octahedra are not tilted. In the second Sb site, Sb(2) is bonded to two equivalent Sm(1) and four equivalent Ga(1) atoms to form SbSm2Ga4 octahedra that share corners with six equivalent Sb(2)Sm2Ga4 octahedra, edges with four equivalent Sb(2)Sm2Ga4 octahedra, and edges with eight equivalent Sb(1)Sm4Ga2 octahedra. The corner-sharing octahedra are not tilted.
SmGaSb2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. Sm(1) is bonded to two equivalent Sb(2) and four equivalent Sb(1) atoms to form SmSb6 octahedra that share corners with six equivalent Sm(1)Sb6 octahedra, edges with four equivalent Sm(1)Sb6 octahedra, and edges with eight equivalent Ga(1)Sb6 octahedra. The corner-sharing octahedra are not tilted. Both Sm(1)-Sb(2) bond lengths are 3.15 Å. All Sm(1)-Sb(1) bond lengths are 3.07 Å. Ga(1) is bonded to two equivalent Sb(1) and four equivalent Sb(2) atoms to form GaSb6 octahedra that share corners with six equivalent Ga(1)Sb6 octahedra, edges with four equivalent Ga(1)Sb6 octahedra, and edges with eight equivalent Sm(1)Sb6 octahedra. The corner-sharing octahedra are not tilted. Both Ga(1)-Sb(1) bond lengths are 3.15 Å. All Ga(1)-Sb(2) bond lengths are 3.07 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to four equivalent Sm(1) and two equivalent Ga(1) atoms to form SbSm4Ga2 octahedra that share corners with six equivalent Sb(1)Sm4Ga2 octahedra, edges with four equivalent Sb(1)Sm4Ga2 octahedra, and edges with eight equivalent Sb(2)Sm2Ga4 octahedra. The corner-sharing octahedra are not tilted. In the second Sb site, Sb(2) is bonded to two equivalent Sm(1) and four equivalent Ga(1) atoms to form SbSm2Ga4 octahedra that share corners with six equivalent Sb(2)Sm2Ga4 octahedra, edges with four equivalent Sb(2)Sm2Ga4 octahedra, and edges with eight equivalent Sb(1)Sm4Ga2 octahedra. The corner-sharing octahedra are not tilted.