Clay

Clay

AL203 2Si02 2H20. The decomposition of Granite through the process of Kaolinization creates clay (see Kaolinization). Clay is a mineral with a plate (platelet) like structure; it is these plates, (about 0.5 microns across) when lubricated with water, slide against each other to form the plastic mass we know as clay (see Water). ‘Primary I clays are those found close to the area of Kaolinization and hence the purest (Kaolin or China Clays). Secondary clays are those moved by water away form the site of Kaolinization and get progressively more plastic and less pure (Ball Clays, Fire clays, Earthenware’s and Marls).


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