Raman microprobe analysis of stucco samples from the buildings of Maya Classic Copan |
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Authors: | R.A. Goodall J. Hall H.G.M. Edwards R.J. Sharer R. Viel P.M. Fredericks |
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Affiliation: | 1. School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Qld 4001, Australia;2. School of Social Sciences, University of Queensland, Brisbane, Qld 4067, Australia;3. Chemical and Forensic Sciences, University of Bradford, Bradford, West Yorks BD7 1DP, UK;4. University of Pennsylvania Museum, Philadelphia, PA, 19104-6324, USA |
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Abstract: | Micro-Raman spectroscopy has been applied to painted stucco samples from three buildings at the Maya site of Copan, Honduras. The buildings, Clavel (AD 450–550), Ani (AD550–650) and Structure 10L-22 (AD730,) date from three phases of the Classic Period (AD400–820) acropolis construction. The red pigment has been identified as haematite and the stucco as a mixture of calcite particles dispersed throughout a calcite based lime wash stucco. The physical structure of the stucco changed through time, indicating a refining of production techniques over this period. By combining Micro-Raman spectroscopy with other micro-ATR infrared spectroscopy and environmental scanning electron microscopy a detailed investigation of the materials and production techniques used to decorate these buildings has been made. Differences in the mineralogy of the red pigment used on each building indicate a different geological pigment source for each period. |
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Keywords: | Raman microscopy Pigments Stucco Archaeology Copan Maya |
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