Cs2TaTlF6 crystallizes in the cubic Fm-3m space group. Cs(1) is bonded to twelve equivalent F(1) atoms to form CsF12 cuboctahedra that share corners with twelve equivalent Cs(1)F12 cuboctahedra, faces with six equivalent Cs(1)F12 cuboctahedra, faces with four equivalent Ta(1)F6 octahedra, and faces with four equivalent Tl(1)F6 octahedra. Ta(1) is bonded to six equivalent F(1) atoms to form TaF6 octahedra that share corners with six equivalent Tl(1)F6 octahedra and faces with eight equivalent Cs(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. Tl(1) is bonded to six equivalent F(1) atoms to form TlF6 octahedra that share corners with six equivalent Ta(1)F6 octahedra and faces with eight equivalent Cs(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. F(1) is bonded in a distorted single-bond geometry to four equivalent Cs(1), one Ta(1), and one Tl(1) atom.
Cs2TaTlF6 crystallizes in the cubic Fm-3m space group. Cs(1) is bonded to twelve equivalent F(1) atoms to form CsF12 cuboctahedra that share corners with twelve equivalent Cs(1)F12 cuboctahedra, faces with six equivalent Cs(1)F12 cuboctahedra, faces with four equivalent Ta(1)F6 octahedra, and faces with four equivalent Tl(1)F6 octahedra. All Cs(1)-F(1) bond lengths are 3.36 Å. Ta(1) is bonded to six equivalent F(1) atoms to form TaF6 octahedra that share corners with six equivalent Tl(1)F6 octahedra and faces with eight equivalent Cs(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. All Ta(1)-F(1) bond lengths are 2.07 Å. Tl(1) is bonded to six equivalent F(1) atoms to form TlF6 octahedra that share corners with six equivalent Ta(1)F6 octahedra and faces with eight equivalent Cs(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. All Tl(1)-F(1) bond lengths are 2.66 Å. F(1) is bonded in a distorted single-bond geometry to four equivalent Cs(1), one Ta(1), and one Tl(1) atom.