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Characterization of archeological glasses by micro‐Raman spectroscopy
Author(s) -
Cesaratto A.,
Sichel P.,
Bersani D.,
Lottici P. P.,
Montenero A.,
SalvioliMariani E.,
Catarsi M.
Publication year - 2010
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2613
Subject(s) - raman spectroscopy , mineralogy , analytical chemistry (journal) , characterization (materials science) , deconvolution , materials science , bending , polymerization , archaeology , geology , chemistry , composite material , optics , polymer , physics , history , nanotechnology , chromatography
The method based on the deconvolution of the Raman spectra of glasses, proposed for the investigation of glazed ceramics by Colomban, is applied to archeological samples of glass of two different origins in an attempt to characterize the glass composition and the fictive temperature using a contactless, nondestructive spectroscopic technique. The samples investigated are glassy mosaic tesserae of Roman times from Massa Lubrense, Napoli, Italy, and medieval rosary grains found during the excavations in the church of San Martino di Rivosecco, Parma, Italy. The polymerization index, obtained as the ratio of the bending and stretching band amplitudes, suggests firing temperatures not less than 1000–1100 °C for both Roman and medieval glasses. From the wavenumber shift of some stretching bands at about 1050–1100 cm −1 , the content of lead was estimated. The medieval samples show a lower Pb content, a result confirmed by elementary energy dispersive X‐ray spectral data. Copyright © 2010 John Wiley & Sons, Ltd.