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The potential of Raman spectroscopy in glass studies

Publication date 2012
B-Phot Authors Wendy Meulebroeck, Andrea Ceglia, Hilde Wouters, Hugo Thienpont
DOI 10.1117/12.981648
K. Baert et al., “The potential of Raman spectroscopy in glass studies,” presented at the Proc. SPIE, Integrated Approaches to the study of historical Glass - IAS12, 2012, vol. 8422, p. 842207.
Abstract Raman spectroscopy is presented as a suitable and fast non-destructive technique to obtain qualitative information about glass samples of various origins (ancient and modern/industrial glass). A first application is the broad corpus of archaeological window glass that still needs to be investigated. For many sites, archaeologists have to deal with large collections of excavated glass samples and a selection of the most appropriate samples for chemical analysis is necessary. A fast classification can be made based on Raman spectra: different kind of glasses (Alkali-glass, HighLime-Low Alkali glass (HLLA)) have their own typical Raman signature. Even for glasses giving strong fluorescence, a classification is possible after a simple treatment of the Raman data. Raman spectroscopy has also been utilized to identify iron containing glasses. The effect of the iron content in glass samples is reflected on the topology of the Raman spectra: a strong link between the ratio of the Q(2)/Q(3) vibration units of the silica tetrahedral structure is seen. Even (semi-) quantitative results can be determined from calibration lines if matrix effects are taken into account (similar glasses). In amber colored glasses, an extra peak similar to 415cm(-1) in the Raman spectra indicates the presence of a Fe-S chromophore. Finally, in the fluorescent signals of some yellow and red glasses two peaks of Zn-Se-Cd-S nanocrystals have been identified.
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