Rb4Au7Sn2, eine intermetallische Phase mit siebenatomigen Goldclustern/ Rb4Au7Sn2, an Intermetallic Phase with Sevenatomic Gold-Clusters

Abstract

In the course of our investigations of the ternary system Rb-Au-Sn we obtained the new compound Rb₄Au₇Sn₂. Its crystal structure has been determined by single crystal X-ray diffraction data. It crystallizes in the hexagonal (rhombohedral) space group R3̄m with unit-cell parameters a = 680.1(3) pm and c = 2909.0(7) pm, and Z = 3. The structure is similar to that of Laves-Phases of the MgCu₂-type.