Publication Details (including relevant citation information):
- 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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