![]() There are obvious differences between kaolinite and halloysite in all range of their spectra, and they also show some difference between kaolinite and coal bearing kaolinite. However, NIR, together with MIR, gives us the sufficient evidence to differentiate the kaolinite and halloysite, especially kaolinite and coal bearing kaolinite. It cannot obviously differentiate the kaolinite and halloysite, leaving alone kaolinite and coal bearing kaolinite. In the MIR spectra, the differences are shown in the 3000-3600 cmâ»Â¹ between kaolinite and halloysite. Kaolinite, coal bearing kaolinite and halloysite are the three relative abundant minerals of the kaolin group, especially in China. Mid-infrared (MIR) and near-infrared (NIR) spectroscopy have been compared and evaluated for differentiating kaolinite, coal bearing kaolinite and halloysite. A spectroscopic comparison of selected Chinese kaolinite, coal bearing kaolinite and halloysite-a mid-infrared and near-infrared study.Ĭheng, Hongfei Yang, Jing Liu, Qinfu Zhang, Jinshan Frost, Ray L
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