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MULTI-INSTRUMENTAL IDENTIFICATION OF ORPIMENT IN ARCHAEOLOGICAL MORTUARY CONTEXTS

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      Abstract

      This paper reports on an unknown yellowish mineral compound found in an archaeological context from Chorrillos cemetery (Calama, Chile) dating to the Early Formative period (800 - 200 B.C.). We used optic microscopy, SEM, EDX, ¹H-RMN, 13C-RMN, and infrared (IR) and Raman spectroscopy to tease out the chemical and molecular composition of the sample. The microscopic images show amorphous yellowish granulates with heterogeneous chemical surfaces. ¹H-RMN and 13C-RMN negative results show that the sample is free of organic matter. The SEM and EDX indicate the presence of arsenic and sulfur in the sample. The IR and Raman analyses suggest the presence of orpiment which is a toxic yellow arsenic sulfide mineral.

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      Arica Inserta en una Región Arsenical: El Arsénico en el Ambiente que Afecta y 45 Siglos de Arsenicismo Crónico

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        Chem

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          Inorg. Chem

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            Author and article information

            Affiliations
            [1 ] Universidad de Tarapacá Chile
            [2 ] Pontificia Universidad Católica de Chile Chile
            [3 ] Pontificia Universidad Católica de Valparaíso Chile
            [4 ] Universidad Andrés Bello Chile
            [5 ] Universidad de Chile Chile
            [6 ] Universidad de Tarapacá Chile
            Contributors
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Journal
            jcchems
            Journal of the Chilean Chemical Society
            J. Chil. Chem. Soc.
            Sociedad Chilena de Química (Concepción )
            0717-9707
            September 2014
            : 59
            : 3
            : 2571-2573
            S0717-97072014000300010
            10.4067/S0717-97072014000300010

            http://creativecommons.org/licenses/by/4.0/

            Product
            Product Information: SciELO Chile
            Categories
            CHEMISTRY, MULTIDISCIPLINARY

            General chemistry

            Northern Chile, Pigments, Chorrillos, SEM-EDX, Raman spectroscopy

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