ErSm3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Er(1) is bonded to twelve equivalent Sm(1) atoms to form ErSm12 cuboctahedra that share corners with twelve equivalent Er(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Sm8Er4 cuboctahedra, faces with six equivalent Er(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Sm8Er4 cuboctahedra. Sm(1) is bonded to four equivalent Er(1) and eight equivalent Sm(1) atoms to form SmSm8Er4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8Er4 cuboctahedra, edges with eight equivalent Er(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Er4 cuboctahedra, faces with four equivalent Er(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Sm8Er4 cuboctahedra.
ErSm3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Er(1) is bonded to twelve equivalent Sm(1) atoms to form ErSm12 cuboctahedra that share corners with twelve equivalent Er(1)Sm12 cuboctahedra, edges with twenty-four equivalent Sm(1)Sm8Er4 cuboctahedra, faces with six equivalent Er(1)Sm12 cuboctahedra, and faces with twelve equivalent Sm(1)Sm8Er4 cuboctahedra. All Er(1)-Sm(1) bond lengths are 3.60 Å. Sm(1) is bonded to four equivalent Er(1) and eight equivalent Sm(1) atoms to form SmSm8Er4 cuboctahedra that share corners with twelve equivalent Sm(1)Sm8Er4 cuboctahedra, edges with eight equivalent Er(1)Sm12 cuboctahedra, edges with sixteen equivalent Sm(1)Sm8Er4 cuboctahedra, faces with four equivalent Er(1)Sm12 cuboctahedra, and faces with fourteen equivalent Sm(1)Sm8Er4 cuboctahedra. All Sm(1)-Sm(1) bond lengths are 3.60 Å.