Rb2CuBiI6 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 Bi(1)I6 octahedra. Cu(1) is bonded to six equivalent I(1) atoms to form CuI6 octahedra that share corners with six equivalent Bi(1)I6 octahedra and faces with eight equivalent Rb(1)I12 cuboctahedra. The corner-sharing octahedra are not tilted. Bi(1) is bonded to six equivalent I(1) atoms to form BiI6 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 Bi(1) atom to form a mixture of distorted face, corner, and edge-sharing IRb4CuBi octahedra. The corner-sharing octahedral tilt angles range from 0-60°.
Rb2CuBiI6 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 Bi(1)I6 octahedra. All Rb(1)-I(1) bond lengths are 4.21 Å. Cu(1) is bonded to six equivalent I(1) atoms to form CuI6 octahedra that share corners with six equivalent Bi(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. Bi(1) is bonded to six equivalent I(1) atoms to form BiI6 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 Bi(1)-I(1) bond lengths are 3.10 Å. I(1) is bonded to four equivalent Rb(1), one Cu(1), and one Bi(1) atom to form a mixture of distorted face, corner, and edge-sharing IRb4CuBi octahedra. The corner-sharing octahedral tilt angles range from 0-60°.