RbCa3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Rb(1) is bonded to twelve equivalent Ca(1) atoms to form RbCa12 cuboctahedra that share corners with twelve equivalent Rb(1)Ca12 cuboctahedra, edges with twenty-four equivalent Ca(1)Rb4Ca8 cuboctahedra, faces with six equivalent Rb(1)Ca12 cuboctahedra, and faces with twelve equivalent Ca(1)Rb4Ca8 cuboctahedra. Ca(1) is bonded to four equivalent Rb(1) and eight equivalent Ca(1) atoms to form CaRb4Ca8 cuboctahedra that share corners with twelve equivalent Ca(1)Rb4Ca8 cuboctahedra, edges with eight equivalent Rb(1)Ca12 cuboctahedra, edges with sixteen equivalent Ca(1)Rb4Ca8 cuboctahedra, faces with four equivalent Rb(1)Ca12 cuboctahedra, and faces with fourteen equivalent Ca(1)Rb4Ca8 cuboctahedra.
RbCa3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Rb(1) is bonded to twelve equivalent Ca(1) atoms to form RbCa12 cuboctahedra that share corners with twelve equivalent Rb(1)Ca12 cuboctahedra, edges with twenty-four equivalent Ca(1)Rb4Ca8 cuboctahedra, faces with six equivalent Rb(1)Ca12 cuboctahedra, and faces with twelve equivalent Ca(1)Rb4Ca8 cuboctahedra. All Rb(1)-Ca(1) bond lengths are 4.12 Å. Ca(1) is bonded to four equivalent Rb(1) and eight equivalent Ca(1) atoms to form CaRb4Ca8 cuboctahedra that share corners with twelve equivalent Ca(1)Rb4Ca8 cuboctahedra, edges with eight equivalent Rb(1)Ca12 cuboctahedra, edges with sixteen equivalent Ca(1)Rb4Ca8 cuboctahedra, faces with four equivalent Rb(1)Ca12 cuboctahedra, and faces with fourteen equivalent Ca(1)Rb4Ca8 cuboctahedra. All Ca(1)-Ca(1) bond lengths are 4.12 Å.