Abstract
This paper includes characterization of three industrially important clays from three different regions of the country: Taldi clay from Purulia district of Eastern Region, Kerala clay from Quilon district of Southern Region and Bikaner clay from Bikaner district of Western Region.Taldi and Kerala clays were found to contain mainly kaolinite (93.5% and 86.33% respectively) with quartz as an impurity. A little amount of a micaceous mineral was also found to be present in Kerala clay. Surface area, cation exchange capacity and moisture absorption were found to be very low for these clays showing high crystallinity of the mineral present in them.Bikaner clay was found to contain mainly montmorillonite with a little amount of kaolinite and quartz. It was observed that the dehydroxylation took place at a lower temperature and in one step. It was found to have large surface area, high cation exchange capacity and moisture absorption capacity indicating disorderedness of the clay structure.
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