RbZn13 crystallizes in the cubic Fm-3c space group. Rb(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Zn(2) atoms. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to twelve equivalent Zn(2) atoms to form a mixture of corner and face-sharing ZnZn12 cuboctahedra. In the second Zn site, Zn(2) is bonded to two equivalent Rb(1), one Zn(1), and nine equivalent Zn(2) atoms to form distorted ZnRb2Zn10 cuboctahedra that share  a cornercorner with one Zn(1)Zn12 cuboctahedra, corners with twenty-seven equivalent Zn(2)Rb2Zn10 cuboctahedra, edges with eight equivalent Zn(2)Rb2Zn10 cuboctahedra, faces with two equivalent Zn(1)Zn12 cuboctahedra, and faces with twenty-three equivalent Zn(2)Rb2Zn10 cuboctahedra.
RbZn13 crystallizes in the cubic Fm-3c space group. Rb(1) is bonded in a 24-coordinate geometry to twenty-four equivalent Zn(2) atoms. All Rb(1)-Zn(2) bond lengths are 3.56 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to twelve equivalent Zn(2) atoms to form a mixture of corner and face-sharing ZnZn12 cuboctahedra. All Zn(1)-Zn(2) bond lengths are 2.63 Å. In the second Zn site, Zn(2) is bonded to two equivalent Rb(1), one Zn(1), and nine equivalent Zn(2) atoms to form distorted ZnRb2Zn10 cuboctahedra that share  a cornercorner with one Zn(1)Zn12 cuboctahedra, corners with twenty-seven equivalent Zn(2)Rb2Zn10 cuboctahedra, edges with eight equivalent Zn(2)Rb2Zn10 cuboctahedra, faces with two equivalent Zn(1)Zn12 cuboctahedra, and faces with twenty-three equivalent Zn(2)Rb2Zn10 cuboctahedra. There are a spread of Zn(2)-Zn(2) bond distances ranging from 2.58-2.90 Å.