Rb2HgGaF6 crystallizes in the cubic Fm-3m space group. Rb(1) is bonded to twelve equivalent F(1) atoms to form RbF12 cuboctahedra that share corners with twelve equivalent Rb(1)F12 cuboctahedra, faces with six equivalent Rb(1)F12 cuboctahedra, faces with four equivalent Hg(1)F6 octahedra, and faces with four equivalent Ga(1)F6 octahedra. Hg(1) is bonded to six equivalent F(1) atoms to form HgF6 octahedra that share corners with six equivalent Ga(1)F6 octahedra and faces with eight equivalent Rb(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. Ga(1) is bonded to six equivalent F(1) atoms to form GaF6 octahedra that share corners with six equivalent Hg(1)F6 octahedra and faces with eight equivalent Rb(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. F(1) is bonded in a distorted single-bond geometry to four equivalent Rb(1), one Hg(1), and one Ga(1) atom.
Rb2HgGaF6 crystallizes in the cubic Fm-3m space group. Rb(1) is bonded to twelve equivalent F(1) atoms to form RbF12 cuboctahedra that share corners with twelve equivalent Rb(1)F12 cuboctahedra, faces with six equivalent Rb(1)F12 cuboctahedra, faces with four equivalent Hg(1)F6 octahedra, and faces with four equivalent Ga(1)F6 octahedra. All Rb(1)-F(1) bond lengths are 3.21 Å. Hg(1) is bonded to six equivalent F(1) atoms to form HgF6 octahedra that share corners with six equivalent Ga(1)F6 octahedra and faces with eight equivalent Rb(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. All Hg(1)-F(1) bond lengths are 2.57 Å. Ga(1) is bonded to six equivalent F(1) atoms to form GaF6 octahedra that share corners with six equivalent Hg(1)F6 octahedra and faces with eight equivalent Rb(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. All Ga(1)-F(1) bond lengths are 1.94 Å. F(1) is bonded in a distorted single-bond geometry to four equivalent Rb(1), one Hg(1), and one Ga(1) atom.