Materials Data on K2RbAuCl6 by Materials Project
RbK2AuCl6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Rb1+ is bonded to six equivalent Cl1- atoms to form RbCl6 octahedra that share corners with six equivalent AuCl6 octahedra and faces with eight equivalent KCl12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Rb–Cl bond lengths are 3.06 Å. K1+ is bonded to twelve equivalent Cl1- atoms to form distorted KCl12 cuboctahedra that share corners with twelve equivalent KCl12 cuboctahedra, faces with six equivalent KCl12 cuboctahedra, faces with four equivalent RbCl6 octahedra, and faces with four equivalent AuCl6 octahedra. All K–Cl bond lengths are 3.95 Å. Au3+ is bonded to six equivalent Cl1- atoms to form AuCl6 octahedra that share corners with six equivalent RbCl6 octahedra and faces with eight equivalent KCl12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Au–Cl bond lengths are 2.51 Å. Cl1- is bonded in a linear geometry to one Rb1+, four equivalent K1+, and one Au3+ atom.