RAMAN AND X-RAY FLUORESCENCE TO IDENTIFY COLORS OF THE GERMAN HYPERINFLATION STAMPS OF THE 1923 COLLECTION

Autor:	Gómez-Jeria, J.S., Campos-Vallette, M.M., Carrasco-Flores, E.A., Gutiérrez V, S.
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	Archaeophilately β-naphthol azopigments German hyperinflation postage stamps Raman spectrum Prussian blue XRF zinc oxide forgery crocoite
Zdroj:	Journal of the Chilean Chemical Society v.64 n.4 2019 SciELO Chile CONICYT Chile instacron:CONICYT Journal of the Chilean Chemical Society, Volume: 64, Issue: 4, Pages: 4622-4626, Published: DEC 2019
Popis:	Colors of a collection set of postage stamps dated 1923 and corresponding to the hyperinflationary period of the German economy were identified with Raman and X-ray fluorescence (XRF) spectroscopies. Molecular systems associated to the blue, green and yellow colours were characterized. Blue colour is Prussian blue (Fe4[Fe(CN)6]3) and the green colour resulted to be a combination of Prussian blue and the yellow/orange pigment (PbCrO4) or a yellow β-naphthol like monoazopigment. The XRF data suggest that ZnO was used as filler.
Databáze:	OpenAIRE
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