|
|
|
|
|
|
Study on the Spectral Characteristics and the Alexandrite Effect of Diaspore |
ZHOU Dan-yi1, 2, LU Tai-jin2*, KE Jie2, CHEN Hua2, SHI Guang-hai1, LI Ke1 |
1. School of Gemology, China University of Geosciences (Beijing), Beijing 100083, China
2. National Gem & Jewelry Technology Administrative Centre, Ministry of Land and Resources, Beijing 100013, China |
|
|
Abstract Diaspore is one of industrial minerals used for extracting aluminum and making fireproofing materials. In recent years, diaspore has been found as a gemstone with alexandrite effect. However, little research has been performed on its spectral characteristics and cause of alexandrite effect. In this study, three diaspore samples with alexandrite effect were investigated with XRF, FTIR, Raman spectrometer, UV-Vis-NIR spectrometer together with measuring CIE colored parameters, and these testing results were compared with those of ordinary diaspore without alexandrite effect. It was found that all of the samples with alexandrite effect displayed yellowish green color in sunlight and brownish red color in incandescent light. Their infrared spectra and Raman spectra are the same as those of ordinary diaspore: the infrared absorption bands are concentrated at 400~1 200,1 800~2 110 and 2 900~3 000 cm-1, and the Raman characteristic peaks are mainly at 154, 331, 448, 665 and 1 189 cm-1. Compared the UV-Vis-NIR spectra with the results of chemical analysis, it is suggested that the d—d electron transition of Fe3+ and Cr3+ in diaspore made approximate transmittance between green-yellowish green (500~560 nm) and orange-red regions (600~780 nm) in visible light. Therefore, the difference in the relative spectral power distribution of ambient light source sheds great influence on the color of such diaspore. This research is the first to obtain color parameters of diaspore in simulated daylight and incandescent light. The alexandrite effect of diaspore can be quantitatively described by the change of a* and h0 color parameters obtained in different light sources. These results will not only provide scientific evidence and data support for the application extension and performance improvement of diaspore, but also serve to inspire deeper research on the optical properties of hydroxides.
|
Received: 2016-10-15
Accepted: 2017-03-12
|
|
Corresponding Authors:
LU Tai-jin
E-mail: taijinlu@hotmail.com
|
|
[1] Liu Yan, Shigley J, Fritsch E, et al. Color Research and Application, 1994, 19(19): 186.
[2] LI Li-ping,YE Dong(李立平, 业 冬). Journal of Gems and Gemmology(宝石和宝石学杂志), 2003, 5(4): 17.
[3] ZHANG Bei-li(张蓓莉). Systematic Gemology, 2<sup>nd</sup> ed(系统宝石学, 第2版). Beijing: Geology Press(北京: 地质出版社), 2008.
[4] LI Sheng-rong(李胜荣). Crystallography and Mineralogy(结晶学与矿物学). Beijing: Geology Press(北京: 地质出版社), 2008.
[5] Canmoglu A, Garcia G J, Correcher V, et al. Spectroscopy Letters, 2014, 47(4): 292.
[6] Hatipolu M, Helvac C, Chamberlain S C, et al. Journal of African Earth Sciences, 2010, 57(5): 525.
[7] Hatipolu M, Akgun M. The Australian Gemmologist, 2009, 23: 559.
[8] Hatipolu M, Türk N, Chamberlain S C, et al. Mineralium Deposita, 2010, 45(2): 201.
[9] Simon Delattre, Etienne Balan, Michele Lazzeri, et al. Physics and Chemistry of Minerals, 2012, 39: 93.
[10] Kolesova V A, Ryskin Y I. Journal of Structural Chemistry, 1962, 3(6): 656.
[11] CHEN Tao,LIU Yun-gui,YIN Zuo-wei, et al(陈 涛,刘云贵,尹作为,等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2013, 33(11): 2964.
[12] Nassau K. The Physics and Chemistry of Colour. New York, Wiley, 1981.
[13] YANG Yu-ling, GUO Ying, TAN Yong-ting, et al(杨育玲, 郭 颖, 谭咏婷, 等). Acta Mineralogica Sinica(矿物学报), 2016, 36(2): 220. |
[1] |
LIANG Ye-heng1, DENG Ru-ru1, 2*, LIANG Yu-jie1, LIU Yong-ming3, WU Yi4, YUAN Yu-heng5, AI Xian-jun6. Spectral Characteristics of Sediment Reflectance Under the Background of Heavy Metal Polluted Water and Analysis of Its Contribution to
Water-Leaving Reflectance[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(01): 111-117. |
[2] |
LIU Jia, ZHENG Ya-long, WANG Cheng-bo, YIN Zuo-wei*, PAN Shao-kui. Spectra Characterization of Diaspore-Sapphire From Hotan, Xinjiang[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2024, 44(01): 176-180. |
[3] |
CUI Xiang-yu1, 3, CHENG Lu1, 2, 3*, YANG Yue-ru1, WU Yan-feng1, XIA Xin1, 3, LI Yong-gui2. Color Mechanism Analysis During Blended Spinning of Viscose Fibers Based on Spectral Characteristics[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(12): 3916-3923. |
[4] |
CUI Song1, 2, BU Xin-yu1, 2, ZHANG Fu-xiang1, 2. Spectroscopic Characterization of Dissolved Organic Matter in Fresh Snow From Harbin[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(12): 3937-3945. |
[5] |
FENG Hai-kuan1, 2, FAN Yi-guang1, TAO Hui-lin1, YANG Fu-qin3, YANG Gui-jun1, ZHAO Chun-jiang1, 2*. Monitoring of Nitrogen Content in Winter Wheat Based on UAV
Hyperspectral Imagery[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(10): 3239-3246. |
[6] |
CHEN Chao-yang1, 2, LIU Cui-hong1, 2, LI Zhi-bin3, Andy Hsitien Shen1, 2*. Alexandrite Effect Origin of Gem Grade Diaspore[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(08): 2557-2562. |
[7] |
LI Bin, HAN Zhao-yang, WANG Qiu, SUN Zhao-xiang, LIU Yan-de*. Research on Bruise Level Detection of Loquat Based on Hyperspectral
Imaging Technology[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(06): 1792-1799. |
[8] |
ZHOU Ao1, 2, YUE Zheng-bo1, 2, LIU A-zuan1, 2, GAO Yi-jun3, WANG Shao-ping3, CHUAI Xin3, DENG Rui1, WANG Jin1, 2*. Spectral Analysis of Extracellular Polymers During Iron Dissimilar
Reduction by Salt-Tolerant Shewanella Aquimarina[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(04): 1320-1328. |
[9] |
NIU An-qiu, WU Jing-gui*, ZHAO Xin-yu. Infrared Spectrum Analysis of Degradation Characteristics of PPC Plastic Film Under Different Covering Methods[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(02): 533-540. |
[10] |
ZHANG Heng-ming1, SHI Yu1*, LI Chun-kai1, 2, 3, GU Yu-fen1, ZHU Ming1. The Effect of Electrode Polarity on Arc Plasma Spectral Characteristics of Self-Shielded Flux Cored Arc Welding[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(12): 3917-3926. |
[11] |
DAI Qian-cheng1, XIE Yong1*, TAO Zui2, SHAO Wen1, PENG Fei-yu1, SU Yi1, YANG Bang-hui2. Research on Fluorescence Retrieval Algorithm of Chlorophyll a Concentration in Nanyi Lake[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(12): 3941-3947. |
[12] |
ZHANG Jian1, LIU Ya-jian2, CAO Ji-hu3. Raman Spectral Characteristics of Pyrite in Luyuangou Gold Deposit, Western Henan Province and Its Indicative Significance for Multiphase Metallogenesis[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(12): 3770-3774. |
[13] |
WANG Zi-min1, MAO Xiao-tian1, YIN Zuo-wei1*, CHEN Chang2, CHENG Tian-jia1. Study on the Spectral Characteristics and the Color-Change Effect of Spinel[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(11): 3541-3545. |
[14] |
WANG Dong-sheng1, WANG Hai-long1, 2, ZHANG Fang1, 3*, HAN Lin-fang1, 3, LI Yun1. Near-Infrared Spectral Characteristics of Sandstone and Inversion of Water Content[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(11): 3368-3372. |
[15] |
HUANG Yue-hao1, 2, JIN Yong-ze2. Analysis and Research on Spectral Characteristics of the Traditional Architectural Color Painting Pigments in Regong, Qinghai Province[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(11): 3519-3525. |
|
|
|
|