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综述了近年来磷灰石红外和拉曼光谱的研究现状 .根据因子群和位置群分析 ,磷灰石中的磷氧四面体 ,通道羟基 ,以及外晶格的红外和拉曼活性振动模式数分别为 9,1 5 ;3 ,4;和 8,1 4个 .理论预测的模式在实测的谱图中得到证实 .磷氧四面体的振动特征强烈地受到四面体畸变的影响 ,随着畸变加大 ,谱带加宽并向低频区规律性位移 .而四面体位置上的畸变也使因子群和位置群分裂值明显增加 .结构通道中 ,随着羟基被氟的替换 ,羟基的伸缩与摆动模式频率分别向低频与高频区位移 ,可据此对结构羟基含量进行间接测定 .外晶格的拉曼振动频率一般在 40 0 cm- 1 以下 ,它们可以提供钙位离子的替换信息 .常见的四面体替换离子如CO32 - ,Si O4 4- ,和 SO4 2 - 等的振动光谱特征则表明 ,这些离子往往同时进入结构 ,对磷酸根离子进行耦合替换 .根据红外吸收特点 ,可以确定碳酸根离子的结构占位 .振动光谱不但是对磷灰石进行物相鉴定的一种技术方法 ,而且是重要的晶体化学研究手段 .
In this paper, the current status of research on infrared and Raman spectroscopy of apatite in recent years is summarized.According to the analysis of factor groups and location groups, the number of excited modes of infrared and Raman activities of the phosphorus oxy tetrahedra, channel hydroxyl groups and outer lattices in apatite Respectively, 9,1 5; 3, 4; and 8,1 4. The theoretical prediction model is confirmed in the measured spectra.The vibration characteristics of the phosphorus oxy tetrahedra are strongly affected by the tetrahedral distortion, with the distortion Increase, the band broadening and regular displacement to the low frequency region.The distortion of the tetrahedron position also makes the factor group and position group split value increased significantly.With the structure channel, with hydroxyl replaced by fluorine, hydroxyl stretching and The swing mode frequencies are shifted to the low and high frequency regions, respectively, and the hydroxyl content of the structure can be measured indirectly. The Raman vibration frequencies of the outer lattices are generally below 400 cm-1, which provide alternative information for calcium ions. The vibrational spectral characteristics of common tetrahedral replacement ions such as CO32 -, Si O4 4-, and SO4 2 - indicate that these ions often enter the structure at the same time and couple to the phosphate ion for substitution. According to the infrared absorption characteristics, Structure of the ion placeholder. Vibrational spectroscopy is not only a technical method for phase identification for the apatite, and it is important to study the crystal chemical means.