Infrared and Raman spectroscopic characterization of the phosphate mineral kosnarite KZr2(PO4)3 in comparison with other pegmatitic phosphates
Infrared and Raman spectroscopic characterization of the phosphate mineral kosnarite KZr2(PO4)3 in comparison with other pegmatitic phosphates
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DOI：
10.1007/s11243-012-9652-x
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发表时间：
2012-10
影响因子：
1.7
通讯作者：
R. Frost;Y. Xi;R. Scholz;F. Belotti
中科院分区：
文献类型：
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作者：
R. Frost;Y. Xi;R. Scholz;F. Belotti
在这项研究中，我们已经使用振动光谱研究磷矿石Kosnarite KZr 2（PO 4）3。对这种矿物的兴趣在于磷酸锆（ZP）锁定放射性元素的能力。ZP具有将放射性相的锕系元素部分浓缩和分散在均匀磷酸锆相中的能力。钾芒硝的拉曼光谱的特征是在1,026 cm− 1处有一个非常强的谱带，归属于PO 43 −ν 1对称伸缩振动的对称伸缩振动。在561、595和638 cm− 1处的一系列谱带被认为是PO 43 −单元的ν 4面外弯曲模。在437 cm− 1的强带与其他较低波数的带在387、405和421 cm− 1被指定为PO 43 −单元的ν 2面内弯曲模。反对称伸缩区域中的频带的数量支持的概念，即在kosnarite结构中的磷酸根阴离子的对称性被保存。红外光谱轮廓的宽度和它的复杂性与良好分辨的拉曼光谱相比，表明伟晶岩磷酸盐更好地研究与拉曼光谱。
In this research, we have used vibrational spectroscopy to study the phosphate mineral kosnarite KZr2(PO4)3. Interest in this mineral rests with the ability of zirconium phosphates (ZP) to lock in radioactive elements. ZP have the capacity to concentrate and immobilize the actinide fraction of radioactive phases in homogeneous zirconium phosphate phases. The Raman spectrum of kosnarite is characterized by a very intense band at 1,026 cm−1assigned to the symmetric stretching vibration of the PO43−ν1symmetric stretching vibration. The series of bands at 561, 595 and 638 cm−1are assigned to the ν4out-of-plane bending modes of the PO43−units. The intense band at 437 cm−1with other bands of lower wavenumber at 387, 405 and 421 cm−1is assigned to the ν2in-plane bending modes of the PO43−units. The number of bands in the antisymmetric stretching region supports the concept that the symmetry of the phosphate anion in the kosnarite structure is preserved. The width of the infrared spectral profile and its complexity in contrast to the well-resolved Raman spectrum show that the pegmatitic phosphates are better studied with Raman spectroscopy.