X-ray absorption spectroscopy investigation has been carried out at the Cu K edge on synthetic materials belonging to the ternary Cu-Sn-S system. In particular, Cu3SnS4 nanocrystalline powders, obtained through a solvothermal approach, and Cu4SnS4 microcrystalline powders, obtained through standard solid state reactions, were investigated. From the XANES spectra, Cu is confirmed to be monovalent in both samples, thus implying a complex mechanism to achieve charge balance in Cu3SnS4. In this sample, the Cu-S EXAFS distance is found surprisingly short, and this suggests that Cu ions could be shifted outside the barycentre of the tetrahedra.
Preliminary XAS investigations on some phases of the Cu-Sn-S system / Francesco Di Benedetto;Francesco d'Acapito;Ilaria Bencistà;Antonio De Luca;Gabriele Fornaciai;Silvia Frizzera;Massimo Innocenti;Giordano Montegrossi;Luca A. Pardi;Maurizio Romanelli. - In: PHYSICA STATUS SOLIDI. C, CURRENT TOPICS IN SOLID STATE PHYSICS. - ISSN 1862-6351. - STAMPA. - 10:(2013), pp. 1055-1057. [10.1002/pssc.201200753]
Preliminary XAS investigations on some phases of the Cu-Sn-S system
DI BENEDETTO, FRANCESCO;BENCISTA', ILARIA;DE LUCA, ANTONIO;INNOCENTI, MASSIMO;ROMANELLI, MAURIZIO
2013
Abstract
X-ray absorption spectroscopy investigation has been carried out at the Cu K edge on synthetic materials belonging to the ternary Cu-Sn-S system. In particular, Cu3SnS4 nanocrystalline powders, obtained through a solvothermal approach, and Cu4SnS4 microcrystalline powders, obtained through standard solid state reactions, were investigated. From the XANES spectra, Cu is confirmed to be monovalent in both samples, thus implying a complex mechanism to achieve charge balance in Cu3SnS4. In this sample, the Cu-S EXAFS distance is found surprisingly short, and this suggests that Cu ions could be shifted outside the barycentre of the tetrahedra.File | Dimensione | Formato | |
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