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COMBINED USE OF SURFACE AND MICRO-ANALYTICAL TECHNIQUES FOR ARCHAEOMETALLURGY

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Author(s): R.-C. Fierascu | Irina Dumitriu | Mihaela-Lucia Ion | A. Catangiu | Rodica-Mariana Ion

Journal: Analele Universitatii Bucuresti : Chimie
ISSN 1220-871X

Volume: XVII;
Issue: I;
Start page: 09;
Date: 2008;
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ABSTRACT
In this paper, we have analyzed several Romanian coins from early XX century. The differences between them are interpreted considering the particularities of the Romanian coinage manufacturing from that date. The unexpected changes of the alloys’ composition, from one year to the next one can be explained by the Romanian specific situations. Our study clearly demonstrates that EDXRF (energy-dispersive X-ray fluorescence) can be used effectively for the nondestructive numismatic analysis; optical microscopy was used for silver coins, being able to observe the presence of copper corrosion products such as cuprite and chloro-argyrite, and the effect of the degradation phenomena on the coin surface. The method can easily be used to analyze coins, indifferently their age, their composition and their state.
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