Rb2TlSbF6 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 Tl(1)F6 octahedra, and faces with four equivalent Sb(1)F6 octahedra. Tl(1) is bonded to six equivalent F(1) atoms to form TlF6 octahedra that share corners with six equivalent Sb(1)F6 octahedra and faces with eight equivalent Rb(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. Sb(1) is bonded to six equivalent F(1) atoms to form SbF6 octahedra that share corners with six equivalent Tl(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 linear geometry to four equivalent Rb(1), one Tl(1), and one Sb(1) atom.
Rb2TlSbF6 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 Tl(1)F6 octahedra, and faces with four equivalent Sb(1)F6 octahedra. All Rb(1)-F(1) bond lengths are 3.45 Å. Tl(1) is bonded to six equivalent F(1) atoms to form TlF6 octahedra that share corners with six equivalent Sb(1)F6 octahedra and faces with eight equivalent Rb(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. All Tl(1)-F(1) bond lengths are 2.67 Å. Sb(1) is bonded to six equivalent F(1) atoms to form SbF6 octahedra that share corners with six equivalent Tl(1)F6 octahedra and faces with eight equivalent Rb(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. All Sb(1)-F(1) bond lengths are 2.20 Å. F(1) is bonded in a distorted linear geometry to four equivalent Rb(1), one Tl(1), and one Sb(1) atom.