http://www.cnr.it/ontology/cnr/individuo/prodotto/ID212024

Combined use of surface and micro-analytical techniques for the study of ancient coins (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Combined use of surface and micro-analytical techniques for the study of ancient coins (Articolo in rivista) (literal)

Anno

2004-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1007/s00339-004-2510-8 (literal)

Alternative label

G.M. Ingo, E. Angelini, T. De Caro, G. Bultrini (2004)
Combined use of surface and micro-analytical techniques for the study of ancient coins
in Applied physics. A, Materials science & processing (Print); Springer New York, New York (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

G.M. Ingo, E. Angelini, T. De Caro, G. Bultrini (literal)

Pagina inizio

171 (literal)

Pagina fine

176 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

79 (literal)

Rivista

Applied physics. A, Materials science & processing (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

6 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

2 (literal)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

G.M. Ingo [1], E. Angelini [2], T. De Caro [1], G. Bultrini [3] [1] ISMN CNR, Area della Ricerca di Roma 1, via Salaria Km 29.3, 00015 Monterotondo, Rome, Italy. [2] Politecnico di Torino, Dipartimento Scienza dei Materiali & Ingegneria Chimica, I-10129 Turin, Italy [3] Università di Catania, Dipartimento Scienze Chimiche, I-95125 Catania, Italy (literal)

Titolo

Combined use of surface and micro-analytical techniques for the study of ancient coins (literal)

Abstract

By means of the combined use of surface and micro-analytical techniques the surface chemical composition of ancient coins and some aspects of their manufacturing techniques and of degradation mechanisms have been elucidated. Two case histories are described concerning silver Roman Republican coins and some coins plated with thin films of silver and gold. In particular, the coinage methods, the silvering and gilding techniques and the origin of the embrittlement of these selected Roman coins have been studied by means of the combined use of selected-area X-ray photoelectron spectroscopy (SA-XPS) and scanning electron microscopy and energy-dispersive spectrometry (SEM+EDS). This innovative approach has been utilised in order to gain further insight into the microchemical structure of the external regions of the coins as well as of the bulk features. The results show the use of mercury to coat a copper or silver core with a thin film of precious metals that could be considered the most important advance in the technology of gilding to be made in antiquity. Furthermore, the microchemical investigation of brittle Roman silver coins has allowed us to identify the origin of this troublesome problem. The microchemical results indicate that brittleness is induced by the presence of a low amount of lead that is retained in supersaturated solution when the cast blank was produced. This latter element segregates at the grain boundaries during the coin production and the subsequent long-term ageing at room temperature, thus inducing the alloy fracturing along the weakened grain boundaries. (literal)

Editore