光谱学与光谱分析 |
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Research on the Mineral Phase and Component of Non-Crystalline and Nano-Crystalline Corrosion Products on Bronzes Unearthed from Shang Tomb in Xingan |
CHENG Xiao-lin, PAN Lu* |
Conservation Center of National Museum of China, Beijing 100006, China |
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Abstract The patinas on bronzes in Shang Tomb of Xingan were powdery, pale green, which were more like “bronze disease”, but the mineral composition of patinas was not paratacamite or atacamite. Micro X-ray diffraction (XRD) and high performance transmission electroscope (HTEM) showed that the patinas were mainly composed of non-crystalline and nano-crystalline SnO2, and the size of nano-crystalline particle was in the range of 4~5.7 nm; Moreover, the energy-dispersive X-ray spectrometry showed that element tin is the primary ingredient of the sample, as well as little copper, silicon, lead and iron were detected. By studying the crystal lattice stripe image of the nanometer SnO2, it was deduced that the chemical formula of nano-crystalline SnO2 did not include other elements; The Raman spectrum of the sample showed that there were not any characteristic peaks of SnO2, the spectrum was more like non-crystalline SnO2, and the weak and broad peak of 973 cm-1 indicated that the sample may contain silicate grains,It was inferred that little of copper, silicon, lead and iron should exist in the form of non-crystalline silicate particles.
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Received: 2011-10-10
Accepted: 2012-01-08
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Corresponding Authors:
PAN Lu
E-mail: panlu@chnmuseum.cn
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