Darstellung und Kristallstruktur von Na3FeSe3 / Preparation and Crystal Structure of Na3FeSe3

Abstract

Na3FeSe3 can be synthesized by the reaction of sodium carbonate with iron sponge at 1000 K under a stream of hydrogen saturated with selenium or by heating a mixture of sodium hydride and iron sponge with selenium in a glass ampoule with a temperature gradient (700/800 K). X-ray investigation on single crystals revealed the structure of Na3FeSe3, isotypic with that of Na3FeS3. The iron and selenium atoms form isolated [Fe2Se6]-anions, consisting of two edge-sharing tetrahedra, with which the sodium atoms build a three-dimensional array