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Raman study of the brownish-yellow pigment from a Roman Basilica (Dobrogea, Romania – 4th–6th century A.D.)

Nicolae Buzgar - “Al. I. Cuza” University of Iaşi, Faculty of Geography and Geology, Department of Geology, 20A Carol I Blv., 700505 Iaşi, Romania
Andrei Buzatu - “Al. I. Cuza” University of Iaşi, Faculty of Geography and Geology, Department of Geology, 20A Carol I Blv., 700505 Iaşi, Romania
Andrei Ionuț Apopei - “Al. I. Cuza” University of Iaşi, Faculty of Geography and Geology, Department of Geology, 20A Carol I Blv., 700505 Iaşi, Romania
Dan Aștefanei - “Al. I. Cuza” University of Iaşi, Faculty of Geography and Geology, Department of Geology, 20A Carol I Blv., 700505 Iaşi, Romania
Florin Topoleanu - Institute of Eco-Museal Research Tulcea, 1bis 14 Noiembrie Str., 820009 Tulcea, Romania

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Abstract:

11 fragments of wall painting from the Beroe fortress, Romania (4th –6th century) were analysed through Raman spectroscopy. The yellow-brown pigment on the fragments is jarosite and/or Na-jarosite. Other than at 445 cm-1, the Raman lines of all the spectra are identical. This Raman line is slightly shifted in different spectra, and this fact proves the presence of both jarosite and Na-jarosite.
Copyright © 2011 Published by Ed. Univ. „Al. I. Cuza” Iași. All rights reserved.



Keywords:

jarosite, natrojarosite, brownish-yellow pigment, Dobrogea, Beroe, Roman, wall painting, Raman spectroscopy



  
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