摘要
为了探讨硫元素在煤中的赋存状态,对煤中硫元素的主要载体黄铁矿的表面进行了扫描隧道显微镜研究。在硅油保护下得到了黄铁矿表面高分辨率图象。根据黄铁矿晶体结构的几何分析,所观察到的是黄铁矿{210}表面的原子分布。黄铁矿的能带结构资料及前人在这方面的研究均表明,用扫描隧道显微镜应首先观察到黄铁矿表面的铁原子,但作者首先观察到的却是黄铁矿表面的硫原子。此外,作者根据所获得的实验结果认为,无论是在{210}方向还是在（100}和{101}方向,表面层以外的原子对最终成象几乎没有贡献,这与Fan和Eggleston等人的分析有所不同。
In order to understand the existing state of sulphur element in coal, the authors study the surface of pyrite, which is the main carrier of sulphur element in coal, with scanning tunneling microscope (STM). High resolution images of pyrite surface were obtained under oil. Analysis based on pyrite crystal structure reveales that the observed surface is the {210} surface of pyrite. Pyrite band data suggest that Fe atoms on pyrite surface should be displayed easier than S atoms. But S atom on {210} surface of our sample seems to come out more clear than Fe atom. This may be related to the impuri-ties of the sample or the absorption of the surface. Based on the experiment results, the authors believe that atoms of underlayers of the surface make little contribution to imaging both in {210} and {100}, {101} directions.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1994年第1期39-42,共4页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金资助项目
关键词
显微镜
表面结构
晶体
黄铁矿
scanning tunneling microscope (STM) , surface, crystal.
