Endohedral [Au@In 10 ] 9– Cluster: Synthesis and Characterization of Na 3+ x A 6– x In 10 Au ( x = 0, 0.25; A = Rb, Cs)

High Resolution Image Download MS PowerPoint Slide The synthesis and characterization of two new compounds Na 3 Rb 6 In 10 Au and Na 3.25 Cs 5.75 In 10 Au are reported, which contain [Au@In 10 ] 9– clusters as anionic entities. Single-crystal X-ray structure analysis shows that the alkali metal composition is the key factor for structure formation, while the anionic entity remains unchanged. The chemical composition was confirmed by SEM/EDS measurements, and the given compositions of both compounds are fixed according to the line compounds. Quantum chemical calculations for the compound Na 3 Rb 6 In 10 Au were performed and show a band gap at the Fermi level, classifying the materials as salt-like, including endohedral [Au@In 10 ] 9– Zintl- type clusters. Dissolution experiments in liquid ammonia were carried out, revealing In 2 Au as the reaction product.