Research on the Spectral Analysis and Stability of Copper Green
LI Man1, WANG Li-qin1*, XIA Yin2,YANG Qiu-ying3
1. College of Cultural Heritage, Northwest University, Xi’an 710069,China 2. Key Scientific Research Base of Ancient Polychrome Pottery Conservation, SACH, Emperor Qinshihuang’s Mausoleum Site Museum, Lintong 710600, China 3. Key Scientific Research Base of Masonry Relics Conservation, Research Institute of Shaanxi Cultural Relics Conservation, Xi’an 710075, China
Abstract:In the history of Chinese pigment, copper green, a pigment, was used in vast territory and for a long time. In the present paper, the nature, spectral characteristics, thermodynamic stability of the four isomers of the basic copper chlorides and also their application in the polychrome relics were discussed. The four isomers can be identified quickly by Raman spectral analysis which is a micro-damage or even a nondestructive technique. The order of their thermodynamic stability is as follows: clinoatacamite>paratacamite>atacamite>botallackite. It was showed that in the relics samples copper green was mostly botallackite and atacamite which were less stable isomers. According to the Ostwald step rule, the environmental monitoring should be strengthened to prevent the change in their physical and chemical structures.
李 蔓1,王丽琴1*,夏 寅2,杨秋颖3 . 铜绿颜料的光谱分析及稳定性研究 [J]. 光谱学与光谱分析, 2013, 33(12): 3293-3297.
LI Man1, WANG Li-qin1*, XIA Yin2,YANG Qiu-ying3 . Research on the Spectral Analysis and Stability of Copper Green . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(12): 3293-3297.
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