摘要
The spatial occurrence of iron in kaolinite of coal measures west of Beijing was studied by using the Mossbauer spectroscopy technique and a step-by-step method of fitting. The results show that there are three kinds of spatial occurrence in kaolinites： tetra-coordination Fe（3＋） in Si-O tetrahedrons, sexa-coordination Fe（3＋） in A1--O octahedrons and sexa-coordination Fe（2＋） in A1-O octahedrons, respectively occupying 51.72 %, 37.25 % and 11.03 %, Neither foreign matter of magnetic Fe mineral nor superparamagnetic goethite exists in kaolin concentrates. Fe in kaolin concentrates cannot be removed by conventional methods, which is significant for both theoretical research on kaolinite minerology and practical use of the kaolinites of coal measures west of Beijing.The research also illustrates that the Mossbauer spectroscopy is an effective method in studying the micro-superfine Fe in kaolin.
The spatial occurrence of iron in kaolinite of coal measures west of Beijing was studied by using the Mossbauer spectroscopy technique and a step-by-step method of fitting. The results show that there are three kinds of spatial occurrence in kaolinites: tetra-coordination Fe(3+) in Si-O tetrahedrons, sexa-coordination Fe(3+) in Al--O octahedrons and sexa-coordination Fe(2+) in Al-O octahedrons, respectively occupying 51.72 %, 37.25 % and 11.03 %. Neither foreign matter of magnetic Fe mineral nor superparamagnetic goethite exists in kaolin con- centrates. Fe in kaolin concentrates cannot be removed by conventional methods, which is significant for both theo- retical research on kaolinite minerology and practical use of the kaolinites of coal measures west of Beijing.The re- search also illustrates that the Mossbauer spectroscopy is an effective method in studying the micro-superfine Fe in kaolin.
基金
Project 3042013 supported by Natural Science Foundation of Beijing
