Materials Data on K2RbAsBr6 by Materials Project
(K)2RbAsBr6 is High-temperature superconductor-derived structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of eight potassium molecules and one RbAsBr6 framework. In the RbAsBr6 framework, Rb1+ is bonded to six equivalent Br1- atoms to form RbBr6 octahedra that share corners with six equivalent AsBr6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Rb–Br bond lengths are 3.23 Å. As3+ is bonded to six equivalent Br1- atoms to form AsBr6 octahedra that share corners with six equivalent RbBr6 octahedra. The corner-sharing octahedral tilt angles are 0°. All As–Br bond lengths are 2.66 Å. Br1- is bonded in a linear geometry to one Rb1+ and one As3+ atom.
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