Sm3Ag is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Sm(1), four equivalent Sm(2), and four equivalent Ag(1) atoms to form distorted SmSm8Ag4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8Ag4 cuboctahedra, edges with eight equivalent Sm(1)Sm8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Sm12 cuboctahedra, faces with four equivalent Ag(1)Sm12 cuboctahedra, and faces with ten equivalent Sm(1)Sm8Ag4 cuboctahedra. In the second Sm site, Sm(2) is bonded in a square co-planar geometry to eight equivalent Sm(1) and four equivalent Ag(1) atoms. Ag(1) is bonded to four equivalent Sm(2) and eight equivalent Sm(1) atoms to form AgSm12 cuboctahedra that share corners with four equivalent Ag(1)Sm12 cuboctahedra, edges with eight equivalent Ag(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Ag4 cuboctahedra, faces with four equivalent Ag(1)Sm12 cuboctahedra, and faces with eight equivalent Sm(1)Sm8Ag4 cuboctahedra.
Sm3Ag is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to four equivalent Sm(1), four equivalent Sm(2), and four equivalent Ag(1) atoms to form distorted SmSm8Ag4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8Ag4 cuboctahedra, edges with eight equivalent Sm(1)Sm8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Sm12 cuboctahedra, faces with four equivalent Ag(1)Sm12 cuboctahedra, and faces with ten equivalent Sm(1)Sm8Ag4 cuboctahedra. All Sm(1)-Sm(1) bond lengths are 3.34 Å. All Sm(1)-Sm(2) bond lengths are 3.50 Å. All Sm(1)-Ag(1) bond lengths are 3.50 Å. In the second Sm site, Sm(2) is bonded in a square co-planar geometry to eight equivalent Sm(1) and four equivalent Ag(1) atoms. All Sm(2)-Ag(1) bond lengths are 3.34 Å. Ag(1) is bonded to four equivalent Sm(2) and eight equivalent Sm(1) atoms to form AgSm12 cuboctahedra that share corners with four equivalent Ag(1)Sm12 cuboctahedra, edges with eight equivalent Ag(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Ag4 cuboctahedra, faces with four equivalent Ag(1)Sm12 cuboctahedra, and faces with eight equivalent Sm(1)Sm8Ag4 cuboctahedra.