2003/10/08 by Andrey Karpov, Jürgen Nuß, Ulrich Wedig +1 · 3 citations
Chemistry · Materials Science · #Inorganic Chemistry and Materials #Crystal Structures and Properties #Organometallic Complex Synthesis and Catalysis
paper · doi:10.1002/anie.200352314
openalex publication_date 2003/10/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/06/22
Relatively ionic: The new platinide Cs2Pt is dark red and transparent. The calculated band structure shows a complete transfer of the valence electrons from cesium to platinum, which exists as a Pt2− ion. This result is further experimental evidence for a relativistic lowering of the 6s orbital energy. The crystal structure, a Ni2In structure type (see picture; Cs yellow, Pt blue), is a high-pressure polymorph of the CaF2 structure. Hence, according to the pressure-homologue rule Cs2Pt can be considered as a homologue of the alkali-metal chalcogenides.