Rb2AuAsI6 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 Au(1)I6 octahedra, and faces with four equivalent As(1)I6 octahedra. Au(1) is bonded to six equivalent I(1) atoms to form AuI6 octahedra that share corners with six equivalent As(1)I6 octahedra and faces with eight equivalent Rb(1)I12 cuboctahedra. The corner-sharing octahedra are not tilted. As(1) is bonded to six equivalent I(1) atoms to form AsI6 octahedra that share corners with six equivalent Au(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 Au(1), and one As(1) atom to form a mixture of corner, face, and edge-sharing IRb4AsAu octahedra. The corner-sharing octahedral tilt angles range from 0-60°.
Rb2AuAsI6 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 Au(1)I6 octahedra, and faces with four equivalent As(1)I6 octahedra. All Rb(1)-I(1) bond lengths are 4.15 Å. Au(1) is bonded to six equivalent I(1) atoms to form AuI6 octahedra that share corners with six equivalent As(1)I6 octahedra and faces with eight equivalent Rb(1)I12 cuboctahedra. The corner-sharing octahedra are not tilted. All Au(1)-I(1) bond lengths are 2.96 Å. As(1) is bonded to six equivalent I(1) atoms to form AsI6 octahedra that share corners with six equivalent Au(1)I6 octahedra and faces with eight equivalent Rb(1)I12 cuboctahedra. The corner-sharing octahedra are not tilted. All As(1)-I(1) bond lengths are 2.91 Å. I(1) is bonded to four equivalent Rb(1), one Au(1), and one As(1) atom to form a mixture of corner, face, and edge-sharing IRb4AsAu octahedra. The corner-sharing octahedral tilt angles range from 0-60°.