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由于铁的赋存形式对高岭石晶格缺陷及其物化性能的影响,长期以来,粘土矿物学界很关心高岭石的铁占位研究.本文主要用~(57)Fe M(?)ssbauer效应研究东胜高岭石中铁的物相、价态和占位,从而深化高岭石的矿物学研究并为东胜高岭石的合理开发利用提供科学依据.1 样品与实验样品采自鄂尔多斯盆地东胜地区侏罗系砂质高岭土.用自然沉降法分选出其中小于2μm的部分.X射线粉末衍射分析表明,样品为纯高岭石.据X射线荧光分析测定,样品中全铁含量为0.73%.M(?)ssbauer效应实验在恒加速度M(?)ssbauer谱仪上进行,放射源为~(57)Co/(Pd),测量温度为300和77K,用α-Fe谱标定速度.每个谱的基线记数达10~6.为检查有无磁分裂谱线出现以
Due to the influence of iron forms on the lattice defects of kaolinite and its physicochemical properties, the clay mineralogy community has long been interested in the study of iron occupancy in kaolinite. In this paper, ~ (57) Fe M (?) Ssbauer Effect of Dongsheng kaolinite iron in the phase, valence and occupancy, thereby deepening the mineralogy of kaolinite and Dongsheng kaolinite to provide a scientific basis for the rational development and utilization.1 samples and experimental samples from the Ordos The Jurassic sandy kaolin in the Dongsheng area of the basin was fractionated by natural sedimentation method, and the fraction smaller than 2μm was fractionated by X-ray powder diffraction analysis.The samples were pure kaolinite.According to X-ray fluorescence analysis, the content of total iron Was 0.73% .M (?) Ssbauer effect experiment was performed on a constant acceleration M (?) Ssbauer spectrometer with a ~ (57) Co / (Pd) source and a temperature of 300 and 77K Velocity. Baseline counts for each spectrum are in the range of 10 to 6. To check for magnetic fission lines present