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The Spectrum Characteristic Research of Color Change Effect and “Light Tarry Effect” Amber from Burma |
SHUAI Chang-chun1, YIN Zuo-wei2*, XUE Qing-fang2, WAN Shao-long3, WU Xiao-bing4 |
1. Anhui Technical College of Industry and Economy,Hefei 230051,China
2. China University of Geosciences,Wuhan 430074,China
3. University of Science and Technology of China,Hefei 230026,China
4. Yunnan Shiya Gems and Mineral Museum, Kunming 650000,China |
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Abstract In recent years, the special color change effect and “light tarry effect” Amber from Burma have been found, and because of precious and rare, those special optical effect Burma Amber have high commercial value and research value. The formation mechanism of color change effect, “light tarry effect” and common Burma amber were studied by using standard gemological methods, modern testing method as: X-ray fluorescence spectrometer (XRF),X-ray powder diffraction (XRD), Fourier infrared absorption spectroscopy (FTIR), Ultraviolet-Visible spectrometer (UV-VIS) to obtain the gemology and spectra characterization of samples. (1) XRF result showed that “light tarry effect” Burma Amber contain high element S which is over 4 times common Burma Amber’s, and contain high element Ca which is 6 times common Burma Amber’s; (2) The UV-VIS result showed that the color change effect Burma Amber have 210 and 447 nm absorption in the UV area; (3) XRD result showed the color change effect Burma Amber have the 150 sharp absorption peaks; (4) Because the five samples are from the same origin which is the Burma,the infrared absorption spectra are similar from all of the samples that have no obvious difference. Conclusion: The above special optical effect Burma amber maybe relate to the temperature and pressure of the stratum which formed the Burma Amber, also relate to the geological timescale. Because of high degree oxidation and the fact that the Burma Amber were founded deeper in the ground, the internal micro structure and trace substance composition have changed, so that special optical effects of some Burma amber arised.
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Received: 2019-02-20
Accepted: 2019-06-05
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Corresponding Authors:
YIN Zuo-wei
E-mail: yinzuowei1025@163.com; yinzuowei@hotmail.com
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