Rb3Lu is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Rb(1) is bonded to eight equivalent Rb(1) and four equivalent Lu(1) atoms to form distorted RbRb8Lu4 cuboctahedra that share corners with twelve equivalent Rb(1)Rb8Lu4 cuboctahedra, edges with eight equivalent Lu(1)Rb12 cuboctahedra, edges with sixteen equivalent Rb(1)Rb8Lu4 cuboctahedra, faces with four equivalent Lu(1)Rb12 cuboctahedra, and faces with fourteen equivalent Rb(1)Rb8Lu4 cuboctahedra. Lu(1) is bonded to twelve equivalent Rb(1) atoms to form LuRb12 cuboctahedra that share corners with twelve equivalent Lu(1)Rb12 cuboctahedra, edges with twenty-four equivalent Rb(1)Rb8Lu4 cuboctahedra, faces with six equivalent Lu(1)Rb12 cuboctahedra, and faces with twelve equivalent Rb(1)Rb8Lu4 cuboctahedra.
Rb3Lu is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Rb(1) is bonded to eight equivalent Rb(1) and four equivalent Lu(1) atoms to form distorted RbRb8Lu4 cuboctahedra that share corners with twelve equivalent Rb(1)Rb8Lu4 cuboctahedra, edges with eight equivalent Lu(1)Rb12 cuboctahedra, edges with sixteen equivalent Rb(1)Rb8Lu4 cuboctahedra, faces with four equivalent Lu(1)Rb12 cuboctahedra, and faces with fourteen equivalent Rb(1)Rb8Lu4 cuboctahedra. All Rb(1)-Rb(1) bond lengths are 4.54 Å. All Rb(1)-Lu(1) bond lengths are 4.54 Å. Lu(1) is bonded to twelve equivalent Rb(1) atoms to form LuRb12 cuboctahedra that share corners with twelve equivalent Lu(1)Rb12 cuboctahedra, edges with twenty-four equivalent Rb(1)Rb8Lu4 cuboctahedra, faces with six equivalent Lu(1)Rb12 cuboctahedra, and faces with twelve equivalent Rb(1)Rb8Lu4 cuboctahedra.