Materials Data on K2RbAuBr6 by Materials Project

(K)2RbAuBr6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight potassium molecules and one RbAuBr6 framework. In the RbAuBr6 framework, Rb1+ is bonded to six equivalent Br1- atoms to form RbBr6 octahedra that share corners with six equivalent AuBr6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Rb–Br bond lengths are 3.22 Å. Au3+ is bonded to six equivalent Br1- atoms to form AuBr6 octahedra that share corners with six equivalent RbBr6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Au–Br bond lengths are 2.66 Å. Br1- is bonded in a linear geometry to one Rb1+ and one Au3+ atom.