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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >A vibrational spectroscopic study of perhamite, an unusual silico-phosphate
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A vibrational spectroscopic study of perhamite, an unusual silico-phosphate

机译：硼硅石（一种不寻常的硅磷酸盐）的振动光谱研究

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The silico-phosphate mineral perhamite has been studied using a combination of electron and vibrational spectroscopy. SEM photomicrographs reveal that perhamite morphology consists of very thin intergrown platelets that can form a variety of habits. Infrared spectroscopy in the hydroxyl-stretching region shows a number of overlapping bands which are observed in the range 3581-3078 cm(-1). These wavenumbers enable an estimation to be made of the hydrogen bond distances in perhamite: 3.176(0), 2.880(5), 2.779(6), 2.749(3), 2.668(1) and 2.599(7) A. Intense Raman bands are observed in the region 1110-1130 and 966-996 cm(-1) and are assigned to the SiO4 and PO4 symmetric stretching modes. Other bands are observed in the range 1005-1096 cm(-1) and are attributed to the nu(3) antisymmetric bending modes Of PO4. Some low intensity bands around 874 cm(-1) were discovered and remain unclassified. Bands in the low-wavenumber region are assigned to the nu(4) and nu(2) out-of-plane bending modes of the OSiO and PO4 units. Raman spectroscopy is a useful tool in determining the vibrational spectroscopy of mixed hydrated multi-anion minerals such as perhamite. Information on such a mineral would be difficult to obtain by other means. (c) 2006 Elsevier B.V. All rights reserved.
机译：使用电子和振动光谱学的方法研究了硅磷酸盐无机碳铁矿。扫描电镜显微照片显示，钙铁矿的形态由非常薄的互生血小板组成，可以形成多种习惯。羟基拉伸区的红外光谱显示了许多重叠的谱带，在3581-3078 cm（-1）范围内观察到。这些波数使得可以估算钙铁矿中的氢键距离：3.176（0），2.880（5），2.779（6），2.749（3），2.668（1）和2.599（7）A.强拉曼谱带在区域1110-1130和966-996 cm（-1）中观察到的，被指定为SiO4和PO4对称拉伸模式。在1005-1096 cm（-1）范围内观察到其他带，并归因于PO4的nu（3）反对称弯曲模式。在874 cm（-1）附近发现了一些低强度带，但仍未分类。将低波数区域中的波段分配给OSiO和PO4单元的nu（4）和nu（2）面外弯曲模式。拉曼光谱法是确定混合水合多阴离子矿物质（如全土）的振动光谱的有用工具。此类矿物的信息将很难通过其他方式获得。 （c）2006 Elsevier B.V.保留所有权利。

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