School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
Spectrochim Acta A Mol Biomol Spectrosc. 2013 Nov;115:376-81. doi: 10.1016/j.saa.2013.06.012. Epub 2013 Jun 28.
The objective of this work is to determine the thermal stability and vibrational spectra of datolite CaBSiO4(OH) and relate these properties to the structure of the mineral. The thermal analysis of datolite shows a mass loss of 5.83% over a 700-775°C temperature range. This mass loss corresponds to 1 water (H2O) molecules pfu. A quantitative chemical analysis using electron probe was undertaken. The Raman spectrum of datolite is characterized by bands at 917 and 1077cm(-1) assigned to the symmetric stretching modes of BO and SiO tetrahedra. A very intense Raman band is observed at 3498cm(-1) assigned to the stretching vibration of the OH units in the structure of datolite. BOH out-of-plane vibrations are characterized by the infrared band at 782cm(-1). The vibrational spectra are based upon the structure of datolite based on sheets of four- and eight-membered rings of alternating SiO4 and BO3(OH) tetrahedra with the sheets bonded together by calcium atoms.
本工作旨在确定硅硼钙石 CaBSiO4(OH) 的热稳定性和振动光谱，并将这些性质与矿物结构联系起来。硅硼钙石的热分析表明，在 700-775°C 的温度范围内，质量损失为 5.83%。这个质量损失对应于 1 个水分子（H2O）分子。使用电子探针进行了定量化学分析。硅硼钙石的拉曼光谱的特征在于在 917 和 1077cm(-1) 处的带归因于 BO 和 SiO 四面体的对称伸缩模式。在 3498cm(-1) 处观察到一个非常强的拉曼带，归因于硅硼钙石结构中 OH 单元的伸缩振动。BOH 面外振动的特征是在 782cm(-1) 处的红外带。振动光谱是基于硅硼钙石的结构，该结构由交替的 SiO4 和 BO3(OH) 四面体的四元和八元环层组成，这些层由钙离子键合在一起。
