Abstract

Mineralogical constitution of ten domestic refractory clays and the morphological characteristics of the principal clay mineral present in them have been studied by differential thermal analysis, X-ray powder diffraction and electron microscopic techniques.Kaolinite is the principal clay mineral in all these clays and is associated with varying amounts of free quartz and minor quantities of illite as well as feldspar in some cases. The morphology of the kaolinite mineral in these clays varies from well developed hexagonal platelets to poorly developed or rounded off crystals.

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