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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.
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 can not be removed by conventional methods, which is significant for both the-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.