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Volume 14 Issue 4
Dec.  2012
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LIAO Guan-lin, ZHOU Zheng-yu, LIAO Zong-ting. XRD and IR Spectra Study on Green Nephrite from Taiwan[J]. Journal of Gems & Gemmology, 2012, 14(4): 23-29.
Citation: LIAO Guan-lin, ZHOU Zheng-yu, LIAO Zong-ting. XRD and IR Spectra Study on Green Nephrite from Taiwan[J]. Journal of Gems & Gemmology, 2012, 14(4): 23-29.
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XRD and IR Spectra Study on Green Nephrite from Taiwan

  • 1. Ocean and Earth Science School, Tongji University, Shanghai 200092, China;

  • 2. Laboratory of Gems and Technological Materials, Tongji University, Shanghai 200092，China

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  • Received Date: July 22, 2012
    Graphical Abstract
    • Abstract
  • Based on the former research results, the green nephrite from Taiwan has been experimented by SEM，XRD and FTIR and the experimental results are compared with the green nephrite from Canada. The results indicate that the green nephrite from Taiwan mainly consists of tremolite, small amounts of actinolite and chlorite. The tremolite shows fibrous structure under microscope which arrays intensively along the macroraxis and interweaved closely. Cell parameters of the green nephrite from Taiwan calculated by XRD show that the crystallinity goes up to 94.62%. Besides, the content of Fe2+ in the green nephrite from Tairwan is much higher than that in the green nephrite from Canada. Among IR spectra, the bands near3674 cm-1 identify the band of OH stretching vibration，the bands near900一1150 cm-1 identify Si4O11 stretching vibration, the bands near 600一800 cm-1 identify the γs(Si一O一Si) vibration, the bands near 400一600 cm-1 identify the coupling of Si一O bending vibration, Mg一O stretching vibration and OH parallel, vibration.
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    • References (13)
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