LIF/Raman/XRF non-invasive microanalysis of frescoes from St. Alexander catacombs in Rome

S. Almaviva, R. Fantoni, F. Colao, A. Puiu, F. Bisconti, V. Fiocchi Nicolai, M. Romani, S. Cascioli, S. Bellagamba

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Abstract

Laser-induced fluorescence (LIF), Raman spectroscopy and X-ray (XRF) fluorescence were used to study two frescoes at the S. Alexander catacombs complex, in Rome. LIF analysis has shown the presence of a transparent protective material probably deposited in previous restoration treatments and allowed to clearly distinguish the areas undergoing the current restoration process from the ones which still have to be treated. Raman and XRF analysis allowed to non-destructively characterizing most of the pictorial materials used for the artworks, including calcite (CaCO3), red ochre (Fe2O3), minium (Pb3O4), yellow ochre (α-FeOOH) and others. Therefore, thanks to the complementarity of the above-mentioned techniques, it was possible to obtain a detailed characterization of the studied frescoes. Finally, the whole ensemble of results constituted a valid tool to effectively plan the restoration of the frescoes.
Original languageEnglish
Pages (from-to)207 - 215
Number of pages9
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume201
DOIs
Publication statusPublished - 5 Aug 2018
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

Cite this

Almaviva, S., Fantoni, R., Colao, F., Puiu, A., Bisconti, F., Fiocchi Nicolai, V., Romani, M., Cascioli, S., & Bellagamba, S. (2018). LIF/Raman/XRF non-invasive microanalysis of frescoes from St. Alexander catacombs in Rome. Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 201, 207 - 215. https://doi.org/10.1016/j.saa.2018.04.062