Rb2AuGaI6 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 Ga(1)I6 octahedra. Au(1) is bonded to six equivalent I(1) atoms to form AuI6 octahedra that share corners with six equivalent Ga(1)I6 octahedra and faces with eight equivalent Rb(1)I12 cuboctahedra. The corner-sharing octahedra are not tilted. Ga(1) is bonded to six equivalent I(1) atoms to form GaI6 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 Ga(1) atom to form a mixture of distorted edge, corner, and face-sharing IRb4GaAu octahedra. The corner-sharing octahedral tilt angles range from 0-60°.
Rb2AuGaI6 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 Ga(1)I6 octahedra. All Rb(1)-I(1) bond lengths are 4.14 Å. Au(1) is bonded to six equivalent I(1) atoms to form AuI6 octahedra that share corners with six equivalent Ga(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 2.95 Å. Ga(1) is bonded to six equivalent I(1) atoms to form GaI6 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 Ga(1)-I(1) bond lengths are 2.90 Å. I(1) is bonded to four equivalent Rb(1), one Au(1), and one Ga(1) atom to form a mixture of distorted edge, corner, and face-sharing IRb4GaAu octahedra. The corner-sharing octahedral tilt angles range from 0-60°.