Identifying and quantifying amorphous and crystalline content in complex powdered samples: application to archaeological carbon blacks

Abstract : Carbon black materials have been frequently used from prehistory as pigments for drawings and paintings and also as dyes, inks and cosmetics, since they are easy to make by burning organic matter. However, the carbonaceous phases they form are often ill-ordered and not easy to characterize. Five carbon black Roman micro samples found in vessels in houses in Pompeii were studied. These precious powders correspond to mixed phase samples that contain both crystalline and ill-ordered components. Here, a methodological approach that accomplishes the identification, quantification and mapping of the different phases in these heterogeneous samples using synchrotron-based techniques is proposed. The results were compared with those from scanning electron microscopy. Information about the nature of the mixtures and the origin of carbon black pigments is obtained. The use of charred vegetable materials is concluded, independently of the shape and the nature of the container.
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Article dans une revue
Journal of Applied Crystallography, International Union of Crystallography, 2016, 49 (2), pp.585-593. 〈10.1107/S1600576716003551〉
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https://hal.archives-ouvertes.fr/hal-01355748
Contributeur : Pierre Bordet <>
Soumis le : mercredi 24 août 2016 - 10:48:26
Dernière modification le : mercredi 29 novembre 2017 - 16:36:29

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Sophie Cersoy, Pauline Martinetto, Pierre Bordet, Jean Louis Hodeau, Elsa Van Elslande, et al.. Identifying and quantifying amorphous and crystalline content in complex powdered samples: application to archaeological carbon blacks. Journal of Applied Crystallography, International Union of Crystallography, 2016, 49 (2), pp.585-593. 〈10.1107/S1600576716003551〉. 〈hal-01355748〉

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