School of Mining Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2010 Nov;77(4):856-61. doi: 10.1016/j.saa.2010.08.018. Epub 2010 Aug 14.
Mid-infrared (MIR) and near-infrared (NIR) spectroscopy have been compared and evaluated for differentiating kaolinite, coal bearing kaolinite and halloysite. Kaolinite, coal bearing kaolinite and halloysite are the three relative abundant minerals of the kaolin group, especially in China. In the MIR spectra, the differences are shown in the 3000-3600 cm⁻¹ between kaolinite and halloysite. It cannot obviously differentiate the kaolinite and halloysite, leaving alone 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. 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. Therefore, the reproducibility of measurement, signal to noise ratio and richness of qualitative information should be simultaneously considered for proper selection of a spectroscopic method for mineral analysis.
中红外（MIR）和近红外（NIR）光谱法已被用于区分高岭石、含煤高岭石和埃洛石。高岭石、含煤高岭石和埃洛石是高岭石族中三种相对丰富的矿物，尤其是在中国。在 MIR 光谱中，高岭石和埃洛石在 3000-3600 cm⁻¹之间存在差异。它不能明显地区分高岭石和埃洛石，更不用说高岭石和含煤高岭石了。然而，NIR 与 MIR 结合，为我们提供了充分的证据来区分高岭石和埃洛石，特别是高岭石和含煤高岭石。它们在各自的光谱范围内都有明显的差异，而且在高岭石和含煤高岭石之间也有一些差异。因此，在选择用于矿物分析的光谱方法时，应同时考虑测量的重现性、信噪比和定性信息的丰富性。
