Clay 6
Clay 6 : A plastic, soft, variously-colored earth commonly a hydrous silicate of alumina formed by the decomposition of feldspar and other aluminum silicates. See also: Attapulgite, Bentonite, High Yield, Low Yield, and Natural Clays. Clay minerals are essentially insoluble in water but disperse under hydration, shearing forces such as grinding, velocity effects, etc., into the extremely small particles varying from submicron to 100-micron sizes. (Bul D11)