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INTRODUCTIONTherearemanyreportsonusingsilicategelandoxidegeltosynthesizekaolinite,butfewonthegelsandamorphousmaterialinnaturalka olin .Clayscanberegardedasconsistingofbothcrystallinemineralsandnoncrystallinematerials(SmithandMitchell,1 987) .Theexistenceofa… 相似文献
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