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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 31  1972
Effect of Exchangeable Cations on Induced Mullitization of Clay
S. P. CHAUDHURI
Pages : 93-97
DOI : 10.1080/0371750X.1972.10840809
Abstract
The influence of Mg+2, Ca+2, Na+, K+ and Fe+3 on the formation ofmullitefrom a pure kaolinite clay has been investigated quantitatively by X-ray diffractometry. The mullite contents of the samples varied between 40 and 60% (the corresponding yield of mullite being 62.5 and 93.8 %) . Introduction of the cations into the clay structure by base exchange reaction led to greater mullitization compared to the results obtained on mechanical mixtures of clay and salts of the same cations. No simple correlations have been observed between mullite contents and ionic radii, potentials and cation-oxygen bond strengths.
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