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The Inverse Perovskite (Ca2EuNx)Sn: A Rare Example for a Homogeneously Mixed-Valent Compound?


  • In Memory of Professor Hans-Georg von Schnering


The cubic Perovskite (Ca2EuN0.75)Sn was synthesized in a solid state reaction from EuN, Ca, and Sn. Nitrogen deficiency and Ca/Eu disorder is in agreement with results from chemical analysis, X-ray diffraction, and Mössbauer spectroscopy. Magnetic susceptibility measurements as well as Mössbauer and X-ray absorption spectroscopy indicate a mixed-valent situation with di- and trivalent europium, apparently situated together with calcium on one crystallographic site. According to electrical resistivity measurements the title compound represents a heavily doped semiconductor.