京西煤系高岭石的铁占位  

Study on the kaolin in coal measures of West Beijing by Mossbauer spectroscopy

作　　者：杨晓杰[1] 丁述理[2] 

机构地区：[1]中国矿业大学(北京校区),北京100083 [2]河北工程学院河北省资源勘测研究重点实验室,河北邯郸056038

出　　处：《河北建筑科技学院学报》2005年第3期73-75,共3页Journal of Hebei Institute of Architectural Science & Technology

基　　金：北京市自然科学基金(3042013);河北省自然科学基金(D2004000463)项目资助

摘　　要：利用Mossbauer谱技术,采用循序渐进的拟合方法,对京西煤系高岭石的铁占位进行了深入研究。研究表明,京西煤系高岭土精矿中不存在任何呈磁有序状态的铁矿物杂质,不存在呈超顺磁性的微粒针铁矿;高岭石结构铁的占位有三种类型:①以四次配位存在于Si-O四面体中的Fe3+;②六配位于A1-O八面体中的Fe2+;③六配位于Al-O八面体中的Fe3+。它们的相对含量分别是45.186%、43.372%和11.442%。其中,四次配位存在于Si-O四面体中的Fe3+的Moss-bauer谱参数在以往的研究尚未明确提出,本文的研究证实了这种铁的存在形式。研究结果对于研究铁的存在形式对高岭石晶格缺陷及其物化性能的影响具有重要理论意义,为京西煤系高岭土的开发利用提供了科学依据。The space occupancy of iron in the kaolinite in coal measures of West Beijing is studied in this paper by using the Mossbauer spectroscopy technique and the step by step fitting method. The result shows that there are three kinds of space occupancy in the kaolinites in coal measures of West Beijing ：tetracoordination Fe（3 ＋ ） in Si - O tetrahedron,sexa - coordination Fe（2 ＋ ） in Al - O octahedron and sexa - coordination （3＋ ） in Al- O octahedron, which consist of 45.186%, 43.372 % and 11.442 % respectively. There is no any Fe mineral foreign matter being magnetic order and goethite being superparamagnetism existing in the kaolin concentrates and Fe in the kaolin concentrates can not be removed by the conventional methods, which is of significance to the theory research on the kaolinite minerology and the developmeng practice of the kaolinites in coal measures of West Beijing.

关 键 词：高岭石 铁占位 MOSSBAUER谱 

分 类 号：P578.964[天文地球—矿物学]