K2TiTlF6 crystallizes in the cubic Fm-3m space group. K(1) is bonded to twelve equivalent F(1) atoms to form distorted KF12 cuboctahedra that share corners with twelve equivalent K(1)F12 cuboctahedra, faces with six equivalent K(1)F12 cuboctahedra, faces with four equivalent Ti(1)F6 octahedra, and faces with four equivalent Tl(1)F6 octahedra. Ti(1) is bonded to six equivalent F(1) atoms to form TiF6 octahedra that share corners with six equivalent Tl(1)F6 octahedra and faces with eight equivalent K(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 Ti(1)F6 octahedra and faces with eight equivalent K(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. F(1) is bonded in a distorted single-bond geometry to four equivalent K(1), one Ti(1), and one Tl(1) atom.
K2TiTlF6 crystallizes in the cubic Fm-3m space group. K(1) is bonded to twelve equivalent F(1) atoms to form distorted KF12 cuboctahedra that share corners with twelve equivalent K(1)F12 cuboctahedra, faces with six equivalent K(1)F12 cuboctahedra, faces with four equivalent Ti(1)F6 octahedra, and faces with four equivalent Tl(1)F6 octahedra. All K(1)-F(1) bond lengths are 3.29 Å. Ti(1) is bonded to six equivalent F(1) atoms to form TiF6 octahedra that share corners with six equivalent Tl(1)F6 octahedra and faces with eight equivalent K(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. All Ti(1)-F(1) bond lengths are 1.99 Å. Tl(1) is bonded to six equivalent F(1) atoms to form TlF6 octahedra that share corners with six equivalent Ti(1)F6 octahedra and faces with eight equivalent K(1)F12 cuboctahedra. The corner-sharing octahedra are not tilted. All Tl(1)-F(1) bond lengths are 2.64 Å. F(1) is bonded in a distorted single-bond geometry to four equivalent K(1), one Ti(1), and one Tl(1) atom.