Spectroscopy and Spectral Analysis, Volume. 38, Issue 4, 1231(2018)

Study on Mineralogy and Spectroscopy of Turquoises from Hami, Xinjiang

LIU Xi-feng1、*, LIN Chen-lu2, LI Dan-dan3,4, ZHU Lin5, SONG Shuang6, LIU Yan7, and SHEN Chong-hui8
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
  • 4[in Chinese]
  • 5[in Chinese]
  • 6[in Chinese]
  • 7[in Chinese]
  • 8[in Chinese]
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    Recently, turquoise from Hami, Xinjiang Provence has been discovered with gem quality and large quantity. In this work, turquoise samples from Hami, Xinjiang were studied with X-ray diffractometer (XRD), laser ablation inductively coupled plasma mass spectrometer (LA-ICP-MS), scanning electronic microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy (Raman), and ultraviolet-visible spectroscopy (UV-Vis) to obtain the mineralogy and spectra characteristics. The chemical composition of turquoise from Hami was characterized by rich Cr (1 617 ppm), V (435 ppm), Ti (428 ppm) and poor Ba (99.9 ppm). And, the color of turquoise gradually changed from green to blue with the decrease of the rate of Fe2O3/CuO. The SEM results showed that the turquoise crystals were mainly needle, columnar and long plate shape with the size of 0.2~3 μm. The infrared and Raman spectra of turquoise were induced by the vibration of phosphate group (located at 1 000~1 200 and 420~650 cm-1), hydroxy group (located at 3 400~3 600 cm-1) and crystal water (located at 3 000~3 300 cm-1). Besides, the UV-Vis spectra of the turquoise samples showed that the absorption peaks at 430 nm and 600~700 nm belonged to the electron transition of Fe3+and Cu2+, respectively.

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    LIU Xi-feng, LIN Chen-lu, LI Dan-dan, ZHU Lin, SONG Shuang, LIU Yan, SHEN Chong-hui. Study on Mineralogy and Spectroscopy of Turquoises from Hami, Xinjiang[J]. Spectroscopy and Spectral Analysis, 2018, 38(4): 1231

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    Paper Information

    Received: Feb. 22, 2017

    Accepted: --

    Published Online: Jun. 12, 2018

    The Author Email: Xi-feng LIU (liuxf@gcu.edu.cn)

    DOI:10.3964/j.issn.1000-0593(2018)04-1231-09

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