SmTl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Sm(1) is bonded to twelve equivalent Tl(1) atoms to form SmTl12 cuboctahedra that share corners with twelve equivalent Sm(1)Tl12 cuboctahedra, edges with twenty-four equivalent Tl(1)Sm4Tl8 cuboctahedra, faces with six equivalent Sm(1)Tl12 cuboctahedra, and faces with twelve equivalent Tl(1)Sm4Tl8 cuboctahedra. Tl(1) is bonded to four equivalent Sm(1) and eight equivalent Tl(1) atoms to form distorted TlSm4Tl8 cuboctahedra that share corners with twelve equivalent Tl(1)Sm4Tl8 cuboctahedra, edges with eight equivalent Sm(1)Tl12 cuboctahedra, edges with sixteen equivalent Tl(1)Sm4Tl8 cuboctahedra, faces with four equivalent Sm(1)Tl12 cuboctahedra, and faces with fourteen equivalent Tl(1)Sm4Tl8 cuboctahedra.
SmTl3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Sm(1) is bonded to twelve equivalent Tl(1) atoms to form SmTl12 cuboctahedra that share corners with twelve equivalent Sm(1)Tl12 cuboctahedra, edges with twenty-four equivalent Tl(1)Sm4Tl8 cuboctahedra, faces with six equivalent Sm(1)Tl12 cuboctahedra, and faces with twelve equivalent Tl(1)Sm4Tl8 cuboctahedra. All Sm(1)-Tl(1) bond lengths are 3.37 Å. Tl(1) is bonded to four equivalent Sm(1) and eight equivalent Tl(1) atoms to form distorted TlSm4Tl8 cuboctahedra that share corners with twelve equivalent Tl(1)Sm4Tl8 cuboctahedra, edges with eight equivalent Sm(1)Tl12 cuboctahedra, edges with sixteen equivalent Tl(1)Sm4Tl8 cuboctahedra, faces with four equivalent Sm(1)Tl12 cuboctahedra, and faces with fourteen equivalent Tl(1)Sm4Tl8 cuboctahedra. All Tl(1)-Tl(1) bond lengths are 3.37 Å.