ChemInform Abstract: The Inverse Perovskite (Ca₂EuN_x)Sn: A Rare Example for a Homogeneously Mixed‐Valent Compound?

Abstract

Mixed-Valent Compound? -The cubic inverse perovskite (Ca2EuN0.75)Sn is synthesized by solid state reaction of Ca, EuN, and Sn in a molar ratio of 2:1:1 (Ta ampule, 1213 K, 192 h and 1323 K, 96 h). The compound is characterized by powder XRD, XAS, Moessbauer spectroscopy, and electrical resistivity and magnetic susceptibility measurements. The compound is a heavily doped semiconductor in which both di-and trivalent Eu is located on one crystallographic site. Therefore, (Ca2EuN0.75)Sn is regarded as an example for the extremely rare case of a homogeneously mixed-valent europium compound. -(GAEBLER, F.; BRAEUNLING, D.; SCHNELLE, W.; SCHELLENBERG, I.; POETTGEN, R.; NIEWA*, R.; Z. Anorg. Allg. Chem. 637 (2011) 7-8, 977-982, http://dx.