Raman spectroscopy of three polymorphs of BiVO4:: clinobisvanite, dreyerite and pucherite, with comparisons to (VO4)3-bearing minerals:: namibite, pottsite and schumacherite
Raman spectroscopy of three polymorphs of BiVO4:: clinobisvanite, dreyerite and pucherite, with comparisons to (VO4)3-bearing minerals:: namibite, pottsite and schumacherite
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DOI：
10.1002/jrs.1499
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发表时间：
2006-07-01
影响因子：
2.5
通讯作者：
Martens, Wayde
中科院分区：
文献类型：
--
作者：
Frost, Ray L.;Henry, Dermot A.;Martens, Wayde
用拉曼光谱和红外光谱分析了三种与物相有关的矿物--角闪石（四斜晶系BiVO_4）、红硅钙石（斜方晶系BiVO_4）和斜钒石（单斜晶系BiVO_4），并与钠米石（Cu（BiO_2）VO_4（OH））、铋镁矾（Bi_3 O（OH）（VO_4）（2））和硼钙石（PbBiH（VO_4）（2）中心点2 H（2）O）的光谱进行了比较。红钒石、斜钒石和钠钙钛矿的特征是VO 4伸缩振动为872、824和846 cm（-1）。在750 ~ 950 cm-1范围内，钙钛矿的拉曼光谱表现出复杂性，在836和790 cm（-1）处有两个强谱带，分别对应于对称和反对称VO 4模。矿物钙镁矾和钾镁矾的特征是在846和874 cm（-1）处有谱带。在红外和拉曼光谱中，在1000-1100 cm（-1）范围内都观察到反对称伸缩模的谱带。低波数区的拉曼光谱比较复杂。在328至370 cm（-1）区域和404至498 cm（-1）区域中识别出带，并将其分配给nu（2）和nu（4）弯曲模。矿物钠镁矾和钙镁矾的特征是在3514和3589 cm（-1）处的强谱带，归属于OH单元的对称伸缩振动。重要的是，拉曼光谱使新的见解，这些钒酸铋矿物的化学。拉曼光谱能够识别矿物基质中的钒酸铋矿物，其中矿物之间存在共生关系。版权所有（C）2006约翰威利父子有限公司
Both Raman and infrared spectroscopy have been used to characterise the three phase-related minerals - dreyerite (tetragonal BiVO4), pucherite (orthorhombic BiVO4) and clinobisvanite (monoclinic BiVO4) - and a comparison of the spectra is made with that of the minerals namibite (Cu(BiO2)VO4(OH)), schumacherite (Bi3O(OH)(VO4)(2)) and pottsite (PbBiH(VO4)(2)center dot 2H(2)O). Pucherite, clinobisvanite and namibite are characterised by VO4 stretching vibrations at 872, 824 and 846 cm(-1). The Raman spectrum of dreyerite shows complexity in the 750 to 950 cm-1 region with two intense bands at 836 and 790 cm(-1) assigned to the symmetric and antisymmetric VO4 modes. The minerals schumacherite and pottsite are characterised by bands at 846 and 874 cm(-1). In both the infrared and Raman, spectra bands are observed in the 1000-1100 cm(-1) region which are attributed to the antisymmetric stretching modes. The Raman spectra of the low wavenumber region are complex. Bands are identified in the 328 to 370 cm(-1) region and in the 404 to 498 cm(-1) region and are assigned to the nu(2) and nu(4) bending modes. The minerals namibite and schumacherite are characterised by intense bands at 3514 and 3589 cm(-1) assigned to the symmetric stretching vibrations of the OH units. Importantly, Raman spectroscopy enables new insights into the chemistry of these bismuth vanadate minerals. Raman spectroscopy enables the identification of the bismuth vanadate minerals in mineral matrices where paragenetic relationships exist between the minerals. Copyright (C) 2006 John Wiley & Sons, Ltd.