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Bing-Sheng Yu, Jiann-Neng Fang and En-Ping Huang Characteristics of the Raman spectra of archaeological Malachites Journal of Raman Spectroscopy 44

Version of Record online: 14 DEC 2012 | DOI: 10.1002/jrs.4230

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Archaeological malachite show weakening of bands in the order of OH stretch (3300 cm−1, most severe) CO3 (600– 1500 cm−1) and CuO (<600 cm−1, less severe), indicating successive stage of corrosion. These malachites are generally blackened in less than 1 min with Ar laser at 25 mW, with loss of 1 or 3 3300 cm−1 OH bands in 10 min. The malachites of natural minerals are blackened in 10 min without losing any 3300 cm−1 bands in 16 min.

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