Spectroscopy and Spectral Analysis, Volume. 41, Issue 8, 2524(2021)
Spectroscopic Characteristics and Coloring Mechanism of Brown Tourmaline Under Heating Treatment
Figures & Tables(6)
Fig. 1. The characteristics comparison of tourmaline unheated and heated samples
(a): Unheated and heated samples; (b): The pleochroism heated sample Tur1:yellow green+brown (//
Fig. 2. Comparison of MIR spectra between before and after heated tourmaline samples
(a): Sample Tur1; (b): Sample Tur3; (c): Sample Tur10
Fig. 3. Comparison of NIR spectra between before and after heated tourmaline sample
Fig. 4. Comparison of UV-Vis spectra between before and after heated tourmaline samples
(a): Tur13 250 ℃; (b): Tur11 350 ℃; (c): Tur8 450 ℃; (d): Tur6 500 ℃; (e): Tur3 500 ℃; (f): Tur1 600 ℃
Table 1. Experimental protocol for heating-treatment tourmaline
View tableView in ArticleTable 1. Experimental protocol for heating-treatment tourmaline
热处理方案 样品编号 目标温度
/℃升温速率
/(℃·min-1)恒温时间
/h气氛 颜色 加热前 加热后 1 Tur1 600 4 4 还原 黄褐色 黄绿色 Tur2 600 4 4 还原 黄褐色 绿色 2 Tur3 500 4 4 还原 褐红色 绿色 Tur4 500 4 4 还原 深褐色 黄绿色 Tur5 500 4 4 中性 褐红+黄绿色 黄绿色 Tur6 500 4 4 中性 褐红+黄绿色 黄绿色 3 Tur7 450 4 3 还原 褐红+褐黄色 黄绿色 Tur8 450 4 3 中性 褐红+褐黄色 黄绿色 Tur9 450 4 3 中性 褐红+褐黄色 黄绿色 4 Tur10 350 4 3 还原 褐红+褐黄色 浅褐红+浅褐黄色 Tur11 350 4 3 还原 黄褐色 褐绿 5 Tur12 250 4 3 还原 褐红色+褐绿色 褐红色+褐绿色 Tur13 250 4 3 还原 褐红+褐黄色 浅褐红+褐黄色
Table 2. X-ray fluorescence spectrometry analysis for tourmaline samples
View tableView in ArticleTable 2. X-ray fluorescence spectrometry analysis for tourmaline samples
编号 Tur1 Tur2 Tur3 Tur4 Tur5 Tur6 Tur7 Tur8 Tur9 Tur10 Tur11 Tur12 Tur13 SiO2 40.48 39.08 41.34 40.82 41.00 40.47 39.85 43.34 40.81 40.51 39.68 40.72 39.43 Al2O3 29.60 32.77 27.62 28.85 29.11 28.92 31.26 25.11 30.02 29.71 31.69 30.70 32.72 Fe2O3 4.14 3.29 3.63 5.37 3.85 3.60 4.04 3.68 4.01 4.01 3.80 3.23 3.44 MnO 7.03 7.21 8.64 5.98 7.62 8.47 7.22 8.34 6.99 7.18 6.44 7.11 6.71 TiO2 0.18 0.14 0.13 0.30 0.13 0.34 0.11 0.14 0.12 0.16 0.21 0.15 0.12 CaO 1.08 0.90 1.01 0.83 0.71 0.97 0.62 0.92 0.65 0.98 1.03 0.82 0.79 ZnO 0.27 0.14 0.16 0.43 0.28 0.16 0.11 0.00 0.13 0.25 0.28 0.00 0.14 H2O* 3.70 3.70 3.69 3.71 3.70 3.68 3.70 3.71 3.71 3.70 3.71 3.72 3.71 B2 10.72 10.73 10.68 10.74 10.73 10.67 10.73 10.75 10.76 10.73 10.75 10.79 10.77 Li2O* 2.79 2.03 3.11 2.98 2.88 2.72 2.34 4.01 2.79 2.76 2.40 2.76 2.17
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Su-wei YUE, Xiao-xu YAN, Jia-qi LIN, Pei-lian WANG, Jun-feng LIU. Spectroscopic Characteristics and Coloring Mechanism of Brown Tourmaline Under Heating Treatment[J]. Spectroscopy and Spectral Analysis, 2021, 41(8): 2524
Paper Information
Category: Research Articles
Received: Jul. 19, 2020
Accepted: --
Published Online: Sep. 8, 2021
The Author Email: YUE Su-wei (yuesuwei@gcu.edu.cn)
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