CobaltMaghrebV1, Main, Exploration, bibRecord, 000729

Raman analysis of ancient pigments on a tile from the Citadel of Algiers.

Identifieur interne : 000729 ( Main/Exploration ); précédent : 000728; suivant : 000730

Raman analysis of ancient pigments on a tile from the Citadel of Algiers.

Auteurs : L D Kock [Afrique du Sud] ; D. De Waal

Source :

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [ 1386-1425 ] ; 2008.

RBID : pubmed:18602862

Descripteurs français

KwdFr :
- Algérie, Analyse spectrale Raman (), Anthropologie culturelle (), Archéologie (), Carbonate de calcium (), Carbone (), Composés du fer III (), Diffraction des rayons X, Pigments biologiques (analyse), Plomb (), Plomb (analyse), Silicates d'aluminium.
MESH :
- analyse : Pigments biologiques, Plomb.
- Algérie, Analyse spectrale Raman, Anthropologie culturelle, Archéologie, Carbonate de calcium, Carbone, Composés du fer III, Diffraction des rayons X, Plomb, Silicates d'aluminium.
Wicri :
- geographic : Algérie.

English descriptors

KwdEn :
- Algeria, Aluminum Silicates, Anthropology, Cultural (methods), Archaeology (methods), Calcium Carbonate (chemistry), Carbon (chemistry), Ferric Compounds (chemistry), Lead (analysis), Lead (chemistry), Pigments, Biological (analysis), Spectrum Analysis, Raman (methods), X-Ray Diffraction.
MESH :
- chemical , analysis : Lead, Pigments, Biological.
- chemical , chemistry : Calcium Carbonate, Carbon, Ferric Compounds, Lead.
- chemical : Aluminum Silicates.
- geographic : Algeria.
- methods : Anthropology, Cultural, Archaeology, Spectrum Analysis, Raman.
- X-Ray Diffraction.

Abstract

A micro-Raman spectroscopy study of a multi-coloured (yellow, blue, white, redish-brown and brown-black) tile shard from the Citadel of Algiers was undertaken. XRD and EDX were used as complementary techniques. The study shows that the heterogeneous three-shade yellow pigment on the tile is composed largely of the ancient ternary (Pb-Sn-Sb) pyrochlore oxide with a dominant Pb-O vibration at 127 cm(-1) consistent with the Pb2SnSbO6.5 structure as verified by XRD. The literature assignment of this band at 132 cm(-1) probably comes from a mixture of pigments. The redish-brown and the brown-black pigments are found to be Naples yellow (Pb2Sb2O7) and lead(II) stannate (Pb2SnO4), respectively, while cobalt blue (CoAl2O4) gives the blue colour and cassiterite (SnO2) is the origin of the white colour. The bulk of the tile body is composed mainly of hematite (alpha-Fe2O3), maghemite (gamma-Fe2O3), magnetite (Fe3O4) and Quartz (alpha-SiO2) with traces of calcite (CaCO3) and amorphous carbon. Micro-Raman spectroscopy proved to be very useful in the characterization of pigments as well as the tile body. These results further establish Raman spectroscopy as a technique of choice for the analysis of pigments on archaeological artifacts. The results obtained here could be used in the restoration and preservation programme of the Citadel itself which stands today as a symbol of pre-colonial Algerian heritage.

DOI: 10.1016/j.saa.2008.04.024
PubMed: 18602862

Affiliations:

Afrique du Sud

Le document en format XML

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<term>Carbon (chemistry)</term>
<term>Ferric Compounds (chemistry)</term>
<term>Lead (analysis)</term>
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<term>Pigments, Biological (analysis)</term>
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<term>Composés du fer III ()</term>
<term>Diffraction des rayons X</term>
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<term>Plomb ()</term>
<term>Plomb (analyse)</term>
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<term>Lead</term>
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<term>Carbonate de calcium</term>
<term>Carbone</term>
<term>Composés du fer III</term>
<term>Diffraction des rayons X</term>
<term>Plomb</term>
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<front><div type="abstract" xml:lang="en">A micro-Raman spectroscopy study of a multi-coloured (yellow, blue, white, redish-brown and brown-black) tile shard from the Citadel of Algiers was undertaken. XRD and EDX were used as complementary techniques. The study shows that the heterogeneous three-shade yellow pigment on the tile is composed largely of the ancient ternary (Pb-Sn-Sb) pyrochlore oxide with a dominant Pb-O vibration at 127 cm(-1) consistent with the Pb2SnSbO6.5 structure as verified by XRD. The literature assignment of this band at 132 cm(-1) probably comes from a mixture of pigments. The redish-brown and the brown-black pigments are found to be Naples yellow (Pb2Sb2O7) and lead(II) stannate (Pb2SnO4), respectively, while cobalt blue (CoAl2O4) gives the blue colour and cassiterite (SnO2) is the origin of the white colour. The bulk of the tile body is composed mainly of hematite (alpha-Fe2O3), maghemite (gamma-Fe2O3), magnetite (Fe3O4) and Quartz (alpha-SiO2) with traces of calcite (CaCO3) and amorphous carbon. Micro-Raman spectroscopy proved to be very useful in the characterization of pigments as well as the tile body. These results further establish Raman spectroscopy as a technique of choice for the analysis of pigments on archaeological artifacts. The results obtained here could be used in the restoration and preservation programme of the Citadel itself which stands today as a symbol of pre-colonial Algerian heritage.</div>
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Serveur d'exploration sur le cobalt au Maghreb

Raman analysis of ancient pigments on a tile from the Citadel of Algiers.

Raman analysis of ancient pigments on a tile from the Citadel of Algiers.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki

	Serveur d'exploration sur le cobalt au Maghreb
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