A High-Resolution Transmission Electron Microscopy Investigation on the Microstructure of Monoclinic Pyrophyllite from Qingtian, Zhejiang Province

详细信息   

• 责任者：Yan Jun (College of Chemical Engineering and Materials Science ; Zhejiang University of Technology ; Hangzhou 310014 ; China) ; Yao Cheng
• 刊名：Rock and Mineral Analysis
• 出版年：2012
• 卷期：31(2)
• 关键词：叶蜡石 ; pyrophyllite ; 微结构 ; microtexture
• 页码：p.295-300
• 图表：illus.,1 table,26 refs.
• 分类号：0700
• issnNo：ISSN0254-5357
• isbnNo：CN11-2131/TD

摘要

The mineralogical characterizations of pyrophyllite from Qingtian were investigated using X-ray Diffraction（XRD）,High-Resolution Transmission Electron Microscopy（HR-TEM） and X-ray Fluorescence Spectrometry（XRF）.The results indicated that the pyrophyllite consists of a composite nanometer size lamina with irregular surface area,and the thickness is about（8±2） nm.XRF results show that the SiO₂/Al₂O₃ molar ratio is 6.2,which is higher than the calculated one for an ideal pyrophyllite（ratio=4.0）. In addition,it was clearly found that crystal defects exist in the microstructure of pyrophyllite.The high energy electron beam irradiation induced the changes in morphology of clay mineral particles,resulting in phase transformation from crystalline to amorphous.