含铀Srilankite的EBSD和SAED研究  

EBSD and SAED study of the uranium-bearing Srilankite

作　　者：魏小燕[1] 周宁超[1,2] 王立社[1] 董会[1] 汪双双[1] WEI Xiao-yan;ZHOU Ning-chao;WANG Li-she;DONG Hui;WANG Shuang-shuang(Xi’an Center of Geological Survey,China Geology Survey,Xi’an Shannxi 710054;Department of Geology,Northwest University,Xi’an Shannxi 710069,China)

机构地区：[1]中国地质调查局西安地质调查中心,陕西西安710054 [2]西北大学地质学系,陕西西安710069

出　　处：《电子显微学报》2019年第3期252-256,共5页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金青年科学基金项目(No.41502034)

摘　　要：以往人们发现的Srilankite中铀含量基本在0.2%以下,高铀含量的Srilankite的报道中也只有产状和化学组成方面的研究,而关于铀含量较高的含铀Srilankite结构方面的研究尚不曾报道。本文在前人研究的基础上,鉴于含铀Srilankite的小尺寸,故选用电子背散射衍射(EBSD)和选区电子衍射(SAED)方法对不同铀含量下的样品进行分析与探讨。结果表明,当UO 2含量在1.26%~9.20%时,即低铀-中铀含量时,Srilankite晶体结构并未随着铀原子的进入而发生显著改变;当UO 2含量在20.60%时,即处于高铀阶段时,矿物的晶体结构已发生蜕晶化。In the past, the uranium content in discovered Srilankite was basically below 0.2%. Only studies on the occurrence and chemical composition of high uranium content Srilankite were reported, while studies on the structure of high uranium content uranium-bearing Srilankite were not reported. On the basis of previous studies, in view of the small size of uranium-bearing Srilankite, electron backscattering diffraction (EBSD) and selected area electron diffraction (SAED) methods were used to analyze and discuss samples with different uranium contents. The results showed that the crystal structure of Srilankite do did not change significantly with the entry of uranium atoms when the UO 2 content was 1.26%-9.20%, that is, when the uranium content was low -medium uranium content. When the UO 2 content was 20.60%, that is, at the stage of high uranium content, the crystal structure of this mineral has undergone amorphization.

关 键 词：含铀Srilankite EBSD SAED 蜕晶化 

分 类 号：P578.941[天文地球—矿物学] TG115.215.3[天文地球—地质学]