Steven Dec - Solid-State 27Al and 29Si NMR Studies of the Reactivity of the Aluminum-Containing Clay Mineral Kaolinite

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      Publication Details (including relevant citation   information):

    1. J.J. Fitzgerald;  A.I. Hamza;  C.E. Bronnimann and   S.F. Dec, Solid State Ionics,     32/33, 378 (1989).


      Solid-state 27Al and 29Si NMR spectroscopy,   X-ray powder diffraction and other chemical analyses have been   used to study the dealumination of uncalcined and calcined   (850°C) kaolinite following extraction with aqueous HCI solutions   at 98°C. The degree of the dealumination is dependent on the   extraction stoichiometry and the temperature of calcination   pretreatment of the kaolinite. Solid-state MASS 27Al   and CP/MASS 29Si NMR studies provide unique   information about the aluminum and silicon atoms in kaolinite   samples before and following the dealumination process. The   results are discussed in light of the current mechanisms proposed   for the dehydration and dealumination processes of kaolinite.


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