School of Geoscience and Surveying Engineering, China University of Mining & Technology, Beijing, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Dec;83(1):518-24. doi: 10.1016/j.saa.2011.08.077. Epub 2011 Sep 9.
Infrared transmission and emission spectroscopy were used to analyze the difference in structure and thermal behavior of two Chinese palygorskites. The position of the main bands identified in the infrared spectra of the palygorskites studied is similar for these two Chinese samples, but there are some differences in their intensity, which is significant. This discrepancy is attributed to the existence of impurities and the geological environments in different regions. The infrared emission spectra clearly show the structural changes and dehydroxylation of the palygorskites when the temperature is raised. The dehydration of the palygorskites is followed by the loss of intensity of the OH stretching vibration bands in the region of 3600-3200 cm(-1). Dehydroxylation is followed by the decrease in intensity in the bands between 3700 and 3550 cm(-1). Dehydration of pure palygorskite was completed by 600°C. Partial loss of coordinated water was observed at 400°C. Infrared emission spectroscopy is an effective method to determine the stability of the mineral.
采用红外透射和发射光谱法分析了两种中国凹凸棒石结构和热行为的差异。研究的两种中国凹凸棒石的红外光谱中确定的主要谱带的位置相似，但它们的强度存在显著差异。这种差异归因于杂质的存在和不同地区的地质环境。红外发射光谱清楚地显示了凹凸棒石在升温时的结构变化和脱羟基作用。凹凸棒石的脱水伴随着 3600-3200 cm(-1) 区域中 OH 伸缩振动带强度的降低。脱羟基作用后，在 3700 到 3550 cm(-1) 之间的波段强度降低。纯凹凸棒石在 600°C 时完成脱水。在 400°C 时观察到部分配位水的损失。红外发射光谱是确定矿物稳定性的有效方法。
