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

DI BENEDETTO, FRANCESCO;
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.
2013
DI BENEDETTO, Francesco; Francesco, D'Acapito; Bencista', Ilaria; DE LUCA, Antonio; Gabriele, Fornaciai; Silvia, Frizzera; Innocenti, Massimo; Giordan...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2485059
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