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China clay or Kaolin is a natural mineral found in partly decompo-sed granite, an igneous feldsparic rock. Chemically, china clay is a hydrated aluminium silicate containing Al2O3.2SiO2.2H2O.
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Bentonite is an absorbent aluminium phyllosilicate generally impure clay consisting mostly of montmorillonite,
(Na,Ca)0.33(Al,Mg)2Si4O10(OH)2·(H2O)n.
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The chemical compound silica, also known as silicon dioxide, is the oxide of silicon, chemical formula SiO2. Siliceous is an adjective meaning "referring to silica".
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Pyrophyllite is a phyllosilicate mineral species belonging to the clay family and composed of aluminium silicate hydroxide: AlSi2O5OH.
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Dolomite is the name of both a carbonate rock and a mineral consisting of calcium magnesium carbonate (CaMg(CO3)2) found in crystals.
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The carbonate mineral calcite is a calcium carbonate corresponding to the formula CaCO3 and is one of the most widely distributed minerals on the Earth's surface.
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Talc is a mineral composed of hydrated magnesium silicate with the chemical formula H2Mg3(SiO3)4 or Mg3Si4O10(OH)2.
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