An XPS study of tarnishing of a gold mask from a pre-Columbian culture

ABSTRACT: The tarnishing originated on a hammered gold mask was analysed. Red tarnishing was observed after three years of storage in an indoor environment in the Gold Museum of Banco de la República, Bogotá, Colombia. Silver sulphide (Ag2S) and silver sulphate (Ag2SO4) compounds were identified as the origin of the tarnishing phenomenon, which is attributed to environmental contamination. Atomic absorption spectroscopy (AAS) and X-ray photoelectron spectroscopy (XPS) techniques were used.

• Autores: Gonzalez Hernandez, Andres Giovanni; Bastidas, David M.; Cano, Emilio; Fajardo, Santiago
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2008
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/35619
• Acceso en línea: https://hdl.handle.net/10495/35619; https://www.researchgate.net/publication/229301732_An_XPS_study_of_tarnishing_of_a_gold_mask_from_a_pre-Columbian_culture
• Palabra clave: Corrosión; Corrosion; Proceso químico; Chemical processes; Espectroscopia de absorción atómica; Atomic absorption spectroscopy; Espectroscopia de fotoelectrones; Photoelectron spectroscopy; http://vocabularies.unesco.org/thesaurus/concept5010; http://vocabularies.unesco.org/thesaurus/concept140
• Rights: openAccess
• License: https://creativecommons.org/licenses/by-nc-nd/4.0/