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Microstructural and compositional characterization of Roman coins

✍ Scribed by I. Calliari; M. Magrini; A. Zambon; P. Guerriero; R. Martini

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
517 KB
Volume
28
Category
Article
ISSN
0049-8246

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✦ Synopsis

Scanning electron microscopy (SEM) with energy-dispersive microanalysis (EDS) and energy-dispersive x-ray spectrometry (EDXRS) were used to investigate the composition and microstructure of some Roman coins from the Julius Caesar and Octavianus periods. The samples were Cu-based alloys with di †erent surface conditions. The microstructural examination supported the chemical analysis data, explaining compositional changes from the surface to the bulk. Compositional data conÐrm the numismatic interpretation : coins issued by Julius Caesar were orichalcum (Cu-Zn alloy) coins whereas asses issued by Octavianus were Cu-Pb-Sn coins.

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This paper reports a study carried out on two Roman coins found in the archaeological site of Sa ˜o Pedro, in Fronteira (Alentejo, Portugal). One coin was in a quite well preserved state, allowing its reading and historical identification, while the other was quite deteriorated and its reading diffi