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. 2012 Nov;97:1058-62. doi: 10.1016/j.saa.2012.07.067. Epub 2012 Aug 4.
The mineral beryllonite has been characterized by the combination of Raman spectroscopy and infrared spectroscopy. SEM-EDX was used for the chemical analysis of the mineral. The intense sharp Raman band at 1011 cm(-1), was assigned to the phosphate symmetric stretching mode. Raman bands at 1046, 1053, 1068 and the low intensity bands at 1147, 1160 and 1175 cm(-1) are attributed to the phosphate antisymmetric stretching vibrations. The number of bands in the antisymmetric stretching region supports the concept of symmetry reduction of the phosphate anion in the beryllonite structure. This concept is supported by the number of bands found in the out-of-plane bending region. Multiple bands are also found in the in-plane bending region with Raman bands at 399, 418, 431 and 466 cm(-1). Strong Raman bands at 304 and 354 cm(-1) are attributed to metal oxygen vibrations. Vibrational spectroscopy served to determine the molecular structure of the mineral. The pegmatitic phosphate minerals such as beryllonite are more readily studied by Raman spectroscopy than infrared spectroscopy.
采用拉曼光谱和红外光谱相结合的方法对矿物绿柱石进行了表征。采用扫描电镜-能谱仪（SEM-EDX）对矿物进行了化学分析。1011cm(-1)处尖锐的强拉曼带归因于磷酸盐对称伸缩振动模式。1046、1053、1068 处的拉曼带以及 1147、1160 和 1175cm(-1)处的低强度带归因于磷酸盐反对称伸缩振动。反对称伸缩振动区域中的谱带数支持磷酸盐阴离子在绿柱石结构中对称减少的概念。这一概念得到了在面外弯曲区域中发现的谱带数的支持。在面内弯曲区域中也发现了多个谱带，拉曼带位于 399、418、431 和 466cm(-1)处。304 和 354cm(-1)处的强拉曼带归因于金属氧振动。振动光谱用于确定矿物的分子结构。与红外光谱相比，磷灰石等伟晶岩磷酸盐矿物更易于通过拉曼光谱进行研究。
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