Rb2TlAlBr6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. Rb(1) is bonded to twelve equivalent Br(1) atoms to form RbBr12 cuboctahedra that share corners with twelve equivalent Rb(1)Br12 cuboctahedra, faces with six equivalent Rb(1)Br12 cuboctahedra, faces with four equivalent Tl(1)Br6 octahedra, and faces with four equivalent Al(1)Br6 octahedra. Tl(1) is bonded to six equivalent Br(1) atoms to form TlBr6 octahedra that share corners with six equivalent Al(1)Br6 octahedra and faces with eight equivalent Rb(1)Br12 cuboctahedra. The corner-sharing octahedra are not tilted. Al(1) is bonded to six equivalent Br(1) atoms to form AlBr6 octahedra that share corners with six equivalent Tl(1)Br6 octahedra and faces with eight equivalent Rb(1)Br12 cuboctahedra. The corner-sharing octahedra are not tilted. Br(1) is bonded in a distorted linear geometry to four equivalent Rb(1), one Tl(1), and one Al(1) atom.
Rb2TlAlBr6 is (Cubic) Perovskite-derived structured and crystallizes in the cubic Fm-3m space group. Rb(1) is bonded to twelve equivalent Br(1) atoms to form RbBr12 cuboctahedra that share corners with twelve equivalent Rb(1)Br12 cuboctahedra, faces with six equivalent Rb(1)Br12 cuboctahedra, faces with four equivalent Tl(1)Br6 octahedra, and faces with four equivalent Al(1)Br6 octahedra. All Rb(1)-Br(1) bond lengths are 4.05 Å. Tl(1) is bonded to six equivalent Br(1) atoms to form TlBr6 octahedra that share corners with six equivalent Al(1)Br6 octahedra and faces with eight equivalent Rb(1)Br12 cuboctahedra. The corner-sharing octahedra are not tilted. All Tl(1)-Br(1) bond lengths are 3.17 Å. Al(1) is bonded to six equivalent Br(1) atoms to form AlBr6 octahedra that share corners with six equivalent Tl(1)Br6 octahedra and faces with eight equivalent Rb(1)Br12 cuboctahedra. The corner-sharing octahedra are not tilted. All Al(1)-Br(1) bond lengths are 2.53 Å. Br(1) is bonded in a distorted linear geometry to four equivalent Rb(1), one Tl(1), and one Al(1) atom.