叶腊石微结构及其晶体结构缺陷的高分辨透射电镜分析  

Determination of Microstructure and Defect Structure in Pyrophyllite by High-Resolution Transmission Electron Microscopy

作　　者：严俊[1] 张俭[1] 胡仙超[1] 姚程[1] 方伟[1] 盛嘉伟[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310014

出　　处：《矿物学报》2012年第1期65-73,共9页Acta Mineralogica Sinica

基　　金：浙江省科技厅重大主题专项(编号:2007C111042);浙江省研究生教育创新基金(1004)

摘　　要：采用场发射扫描电镜(FE-SEM)、高分辨透射电镜(HRTEM)结合选区电子衍射(SAED)、X射线粉晶衍射(XRD)及X射线荧光光谱(XRF)等对浙江青田叶腊石的微结构特征进行较系统的研究。结果表明:①粉晶X射线衍射证实青田叶腊石具有典型的单斜晶系特征,该结论与叶腊石粉体选区电子衍射结果吻合,且其伴生矿为石英。②叶腊石微晶体呈"复式板片"构型,且"复式"板片中薄片厚度约为8±2 nm。③在高能电子束辐照下,叶腊石矿物颗粒形貌及晶格结构发生明显的改变,且由此产生晶格膨胀,并最终形成非晶态。The microstructure characterizations of pyrophyllite were investigated by using field emission scanning electron microscopy （FE-SEM）, high-resolution transmission electron microscopy （HRTEM） coupled with selected area electron diffraction （SAED）, X-ray diffraction （XRD） and X-ray Fluorescence （XRF）. The following results are obtained ： （ 1 ） Major constituents of natural mineral from Qingtian pyrophyllite deposit are pyrophyllite and quartz, and the 2M-pyrophylite is corroborated well. （2） A complex laminal structure of the micro-crystal of pyrophyllite is found, and the thickness of flake microstructure is 8 ± 2 nm. （3） High energy electron beam irradiation induces morphology of clay mineral particles and lattice structure change, and it results in lattice dilatation and transformation from crystalline to amorphous finally.

关 键 词：叶腊石 微结构 扫描电镜 高分辨透射电镜 选区电子衍射 

分 类 号：P575[天文地球—矿物学] P579[天文地球—地质学]