Formation of expandable fluorine micas-aluminum phosphate complexes.

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  • KITAJIMA Kunio
    Department of Synthetic Chemistry, Faculty of Engineering, Shinshu University
  • SUZUKI Eiji
    Department of Synthetic Chemistry, Faculty of Engineering, Shinshu University
  • DAIMON Nobutoshi
    Department of Synthetic Chemistry, Faculty of Engineering, Shinshu University
  • TAKUSAGAWA Nobuo
    Department of Synthetic Chemistry, Faculty of Engineering, Shinshu University

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Other Title
  • 膨潤性ふっ素雲母‐りん酸アルミニウム複合体の生成

Abstract

The formation of the complex between synthetic fluorine micas, Li-taeniolite [LiMg2Li (Si4O10)F2] and Na-F-hectorite [Na1/3Mg2 2/3Li1/3(Si4O10)F2], and aluminum phosph ate was studied at various reaction conditions in order to elucidate the factors affecting the reaction and mechanism of complex formation. The complexes were formed from the suspension of fluorine micas in the solution of AlCl3, Ca(OH)2 and H3PO4 in certain concentration ranges. The compositions of interlayered materials and basal spacings of the complexes varied with the concentration of solution, the reaction time, and the particle size and layer charge of starting samples. The interlayered materials can be generally expressed as n[Al(PO4)x(OH)y], where PO4/Al ratio increases with reaction time and finally tends to converge to a value in the range of 0.8∼M.9. These results suggest that the aluminum phosphate complex is formed through an intermediate, so-called Al-hydroxy complex.

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