白钨矿的振动光谱与颜色成因初探  

Vibrational Spectra of Scheelite and Its Color Genesis

作　　者：刘琰[1] 邓军[1] 邢延炎[1] 江少卿[1] 

机构地区：[1]中国地质大学地质过程与矿产资源国家重点实验室

出　　处：《光谱学与光谱分析》2008年第1期121-124,共4页Spectroscopy and Spectral Analysis

基　　金：教育部跨世纪优秀人才培养计划和科学技术研究重点项目(01037,03178);国家自然科学基金项目(40572063,40172036);中国地质大学地质过程与矿产资源国家重点实验室基金项目(GPMR0530)资助

摘　　要：四川虎牙雪宝顶钨锡铍矿产出晶体硕大、形态完好的橘红色等颜色鲜艳的白钨矿。文章针对白钨矿颜色成因,利用X光粉晶衍射仪、电子探针、红外光谱仪和拉曼光谱仪对4组白钨矿样品谱学特征和化学成份进行研究。X光粉晶衍射仪获得了白钨矿的晶胞参数;电子探针分析获得该地颜色鲜艳的和无色白钨矿及其他无色白钨矿的化学成分;采用红外光谱和拉曼光谱分析了白钨矿的谱学特征并对特征吸收谱带和特征峰进行了归属。电子探针测试结果表明该区白钨矿化学成分接近理想值,振动光谱特征与一般白钨矿相类似表明不同颜色的白钨矿晶体结构基本一致。由此根据晶体场理论在颜色成因方面的解释推测橘红色白钨矿的颜色成因可能与白钨矿中超微晶体结构、矿物中微量元素或稀土元素有关。In order to study the spectral characteristics and color-genetic mechanism of the scheelite with orange color found in scheelite-tin-beryl （W-Sn-Be） deposits in Xuebaoding, four groups of scheelite were investigated by means of EMPA, IR, LRM and XRD. The scheelite samples were tested by XRD and IR in order to reveal if there are other minerals intermingled with scheelite. Meanwhile, the structure, the structure water and the crystal water were studied through infrared spectra. The absorption bands and peaks of infrared and Raman spectra were assigned. Finally, it seems that there is no distinct color difference between scheelite from Xue baoding and those from other places. So, it is conceived that the color causing may correlate with the minor crystal structure, trace element or REE in the crystal.

关 键 词：X光粉晶衍射 红外光谱 拉曼光谱 电子探针 颜色成因 

分 类 号：O657.3[理学—分析化学]