SmAgGa3 crystallizes in the tetragonal I-4m2 space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Ag(1), four equivalent Ga(1), and eight equivalent Ga(2) atoms. Ag(1) is bonded to four equivalent Sm(1), four equivalent Ga(1), and four equivalent Ga(2) atoms to form distorted AgSm4Ga8 cuboctahedra that share corners with four equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra, corners with twelve equivalent Ag(1)Sm4Ga8 cuboctahedra, edges with two equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra, faces with four equivalent Ag(1)Sm4Ga8 cuboctahedra, and faces with four equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to four equivalent Sm(1), four equivalent Ag(1), and four equivalent Ga(2) atoms to form GaSm4Ga4Ag4 cuboctahedra that share corners with four equivalent Ag(1)Sm4Ga8 cuboctahedra, corners with twelve equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra, edges with two equivalent Ag(1)Sm4Ga8 cuboctahedra, faces with four equivalent Ag(1)Sm4Ga8 cuboctahedra, and faces with four equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), two equivalent Ag(1), one Ga(2), and two equivalent Ga(1) atoms.
SmAgGa3 crystallizes in the tetragonal I-4m2 space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Ag(1), four equivalent Ga(1), and eight equivalent Ga(2) atoms. All Sm(1)-Ag(1) bond lengths are 3.44 Å. All Sm(1)-Ga(1) bond lengths are 3.44 Å. All Sm(1)-Ga(2) bond lengths are 3.22 Å. Ag(1) is bonded to four equivalent Sm(1), four equivalent Ga(1), and four equivalent Ga(2) atoms to form distorted AgSm4Ga8 cuboctahedra that share corners with four equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra, corners with twelve equivalent Ag(1)Sm4Ga8 cuboctahedra, edges with two equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra, faces with four equivalent Ag(1)Sm4Ga8 cuboctahedra, and faces with four equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra. All Ag(1)-Ga(1) bond lengths are 2.99 Å. All Ag(1)-Ga(2) bond lengths are 2.59 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to four equivalent Sm(1), four equivalent Ag(1), and four equivalent Ga(2) atoms to form GaSm4Ga4Ag4 cuboctahedra that share corners with four equivalent Ag(1)Sm4Ga8 cuboctahedra, corners with twelve equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra, edges with two equivalent Ag(1)Sm4Ga8 cuboctahedra, faces with four equivalent Ag(1)Sm4Ga8 cuboctahedra, and faces with four equivalent Ga(1)Sm4Ga4Ag4 cuboctahedra. All Ga(1)-Ga(2) bond lengths are 2.59 Å. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), two equivalent Ag(1), one Ga(2), and two equivalent Ga(1) atoms. The Ga(2)-Ga(2) bond length is 2.42 Å.