Rb2ScTlCl6 crystallizes in the cubic Fm-3m space group. Rb(1) is bonded to twelve equivalent Cl(1) atoms to form distorted RbCl12 cuboctahedra that share corners with twelve equivalent Rb(1)Cl12 cuboctahedra, faces with six equivalent Rb(1)Cl12 cuboctahedra, faces with four equivalent Sc(1)Cl6 octahedra, and faces with four equivalent Tl(1)Cl6 octahedra. Sc(1) is bonded to six equivalent Cl(1) atoms to form ScCl6 octahedra that share corners with six equivalent Tl(1)Cl6 octahedra and faces with eight equivalent Rb(1)Cl12 cuboctahedra. The corner-sharing octahedra are not tilted. Tl(1) is bonded to six equivalent Cl(1) atoms to form TlCl6 octahedra that share corners with six equivalent Sc(1)Cl6 octahedra and faces with eight equivalent Rb(1)Cl12 cuboctahedra. The corner-sharing octahedra are not tilted. Cl(1) is bonded in a distorted linear geometry to four equivalent Rb(1), one Sc(1), and one Tl(1) atom.
Rb2ScTlCl6 crystallizes in the cubic Fm-3m space group. Rb(1) is bonded to twelve equivalent Cl(1) atoms to form distorted RbCl12 cuboctahedra that share corners with twelve equivalent Rb(1)Cl12 cuboctahedra, faces with six equivalent Rb(1)Cl12 cuboctahedra, faces with four equivalent Sc(1)Cl6 octahedra, and faces with four equivalent Tl(1)Cl6 octahedra. All Rb(1)-Cl(1) bond lengths are 3.94 Å. Sc(1) is bonded to six equivalent Cl(1) atoms to form ScCl6 octahedra that share corners with six equivalent Tl(1)Cl6 octahedra and faces with eight equivalent Rb(1)Cl12 cuboctahedra. The corner-sharing octahedra are not tilted. All Sc(1)-Cl(1) bond lengths are 2.50 Å. Tl(1) is bonded to six equivalent Cl(1) atoms to form TlCl6 octahedra that share corners with six equivalent Sc(1)Cl6 octahedra and faces with eight equivalent Rb(1)Cl12 cuboctahedra. The corner-sharing octahedra are not tilted. All Tl(1)-Cl(1) bond lengths are 3.06 Å. Cl(1) is bonded in a distorted linear geometry to four equivalent Rb(1), one Sc(1), and one Tl(1) atom.