Francesca Ospitali, Cristina Chiavari, Carla Martini, Elena Bernardi, Fabrizio Passarini and Luc Robbiola The characterization of Sn-based corrosion products in ancient bronzes: a Raman approach Journal of Raman Spectroscopy 43
Tin and its insoluble salts play an important role in the mechanism of formation of bronze patinas, and their characterization becomes fundamental, although quite problematic. This work reports several case studies where Sn-containing compounds were identified in bronzes exposed to different environments (to the atmosphere, in both natural and accelerated ageing conditions, and to the soil), thanks to the hyphenated system scanning electron microscopy–energy dispersive spectrometry–Raman structural and chemical analyser. The main issues regarding the interpretation of Raman spectra of these compounds, mainly crystalline and nano-sized tin dioxides, are presented and discussed.
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