10 documents found, page 1 of 1

When gold stops glittering: corrosion mechanisms of René Lalique's Art Nouveau ...

ABSTRACT: Art Nouveau jewellery created by René Lalique is presently corroded. To identify the corrosion processes, Au-Ag-Cu alloys with compositions comparable to those used in the René Lalique’s jewellery were fabricated to be exposed to sulphide-containing environments. Using SEM-EDS, XRD, UV-Vis spectroscopy and ellipsometry, it was for the first time demon-strated that at the surface of tarnished Au alloys...

When gold stops glittering: corrosion mechanisms of René Lalique's Art Nouveau ...

ABSTRACT: Art Nouveau jewellery created by René Lalique is presently corroded. To identify the corrosion processes, Au-Ag-Cu alloys with compositions comparable to those used in the René Lalique’s jewellery were fabricated to be exposed to sulphide-containing environments. Using SEM-EDS, XRD, UV-Vis spectroscopy and ellipsometry, it was for the first time demon-strated that at the surface of tarnished Au alloys...

A multi-analytical approach to gold in Ancient Egypt: studies on provenance and...

Recent results from a three-year multi-disciplinary project on Ancient Egyptian gold jewellery revealed that items of jewellery from the Middle Kingdom to the New Kingdom were manufactured using a variety of alluvial gold alloys. These alloys cover a wide range of colours and the majority contain Platinum Group Elements inclusions. However, in all the gold foils analysed, these inclusions were found to be absen...

The earrings of Pancas treasure: Analytical study by X-ray based techniques – A...

The development of new metallurgical technologies in the Iberian Peninsula during the Iron Age is well represented by the 10 gold earrings from the treasure of Pancas. This work presents a first approach to the analytical study of these earrings and contributes to the construction of a typological evolution of the Iberian earrings. The manufacture techniques and the alloys composition were studied with three co...

The earrings of Pancas treasure: Analytical study by X-ray based techniques – A...

The development of new metallurgical technologies in the Iberian Peninsula during the Iron Age is well represented by the 10 gold earrings from the treasure of Pancas. This work presents a first approach to the analytical study of these earrings and contributes to the construction of a typological evolution of the Iberian earrings. The manufacture techniques and the alloys composition were studied with three co...

Reconstrução vegetacional e climática no quaternário tardio em estudo multi/int...

Análises químicas não destrutivas do espólio metálico do povoado pré-histórico ...

A necrópole tardo-romana e medieval de Talaíde (Cascais) : caracterização e int...

O depósito do bronze final de Alqueva e a tipologia das lanças do bronze final ...

Estudam-se três peças de bronze - uma ponta de lança e dois contos de lança - provenientes de pequeno abrigo ou cavidade localizada na margem direita do Guadiana, no eixo da futura barragem de Alqueva (Concelho de Moura). Faziam parte de um depósito, constituído originalmente talvez por maior número de peças. A ponta de lança integra-se no grupo das pontas de lança com alvado e de nervura central simples; neste...

Estudo de Antoniniani de um tesouro de localização incerta pelo método de fluor...

O conjunto de antoniniani estudados não permite conclusões de muito interesse numismático, visto ser grande o f'raccionamento previsível que sofreu o conjunto inicial, a par do desconhecimento da sua proveniência segura.