Materials Data on K2AlAuBr6 by Materials Project
K2AuAlBr6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. K1+ is bonded to twelve equivalent Br1- atoms to form KBr12 cuboctahedra that share corners with twelve equivalent KBr12 cuboctahedra, faces with six equivalent KBr12 cuboctahedra, faces with four equivalent AuBr6 octahedra, and faces with four equivalent AlBr6 octahedra. All K–Br bond lengths are 3.81 Å. Au1+ is bonded to six equivalent Br1- atoms to form AuBr6 octahedra that share corners with six equivalent AlBr6 octahedra and faces with eight equivalent KBr12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Au–Br bond lengths are 2.84 Å. Al3+ is bonded to six equivalent Br1- atoms to form AlBr6 octahedra that share corners with six equivalent AuBr6 octahedra and faces with eight equivalent KBr12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Al–Br bond lengths are 2.54 Å. Br1- is bonded in a 6-coordinate geometry to four equivalent K1+, one Au1+, and one Al3+ atom.