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This work intends to critically review the data concerning the variations of reactivity of Ba-exchanged zeolite A precursor with Na + and Li + content originally present in the zeolite framework. The main results were the following: a) obtaining a fully monoclinic celsian from Ba-exchanged zeolite A bearing Na + residual content ranging between 0.20 and 0.74 meq/g required...
A sample of exhaustively Ba-exchanged zeolite-A was subjected to Li-exchange to obtain four samples of zeolite Ba-A bearing different Li amounts. These samples were subjected to thermal treatments at temperatures ranging from 200 to 1100 °C for times up to 28 hours. Samples of fully monoclinic celsian bearing an amount of impurities of 0.62 weight % Na 2 O and 0.17 weight % Li 2 O,...
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