Rb2CuSbI6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. Rb(1) is bonded to twelve equivalent I(1) atoms to form RbI12 cuboctahedra that share corners with twelve equivalent Rb(1)I12 cuboctahedra, faces with six equivalent Rb(1)I12 cuboctahedra, faces with four equivalent Cu(1)I6 octahedra, and faces with four equivalent Sb(1)I6 octahedra. Cu(1) is bonded to six equivalent I(1) atoms to form CuI6 octahedra that share corners with six equivalent Sb(1)I6 octahedra and faces with eight equivalent Rb(1)I12 cuboctahedra. The corner-sharing octahedra are not tilted. Sb(1) is bonded to six equivalent I(1) atoms to form SbI6 octahedra that share corners with six equivalent Cu(1)I6 octahedra and faces with eight equivalent Rb(1)I12 cuboctahedra. The corner-sharing octahedra are not tilted. I(1) is bonded to four equivalent Rb(1), one Cu(1), and one Sb(1) atom to form a mixture of distorted edge, face, and corner-sharing IRb4CuSb octahedra. The corner-sharing octahedral tilt angles range from 0-60°.
Rb2CuSbI6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. Rb(1) is bonded to twelve equivalent I(1) atoms to form RbI12 cuboctahedra that share corners with twelve equivalent Rb(1)I12 cuboctahedra, faces with six equivalent Rb(1)I12 cuboctahedra, faces with four equivalent Cu(1)I6 octahedra, and faces with four equivalent Sb(1)I6 octahedra. All Rb(1)-I(1) bond lengths are 4.17 Å. Cu(1) is bonded to six equivalent I(1) atoms to form CuI6 octahedra that share corners with six equivalent Sb(1)I6 octahedra and faces with eight equivalent Rb(1)I12 cuboctahedra. The corner-sharing octahedra are not tilted. All Cu(1)-I(1) bond lengths are 2.85 Å. Sb(1) is bonded to six equivalent I(1) atoms to form SbI6 octahedra that share corners with six equivalent Cu(1)I6 octahedra and faces with eight equivalent Rb(1)I12 cuboctahedra. The corner-sharing octahedra are not tilted. All Sb(1)-I(1) bond lengths are 3.04 Å. I(1) is bonded to four equivalent Rb(1), one Cu(1), and one Sb(1) atom to form a mixture of distorted edge, face, and corner-sharing IRb4CuSb octahedra. The corner-sharing octahedral tilt angles range from 0-60°.