Kaolin is a pure form of soil (hydrated aluminum silicate). There are three distinct materials: kaolinite, nicrite, and dikite, all of which have the same formula. It is found in earth masses with dark polish. Its structure consists of a two-layer sheet consisting of a layer of silica tetrader (with the accompanying hydroxyl ions) and a layer of aluminum octahedron. Aluminum ions are aligned with the oxygen and hydroxyl ions of the tetrahedral layer on one side and the hydroxyl ions on the other. The bond between adjacent sheets is very weak, there are hydrogen bonds between the hydroxyl ions of a sheet and the oxygen ions of the adjacent sheet. At high temperatures, they lose water and become refractory.


Often found as a product of the chemical effects of air on feldspars, they are transported by sedimentary processes and separated from other sediments and deposited as pure substrates. Kaolinite is extracted from these substrates without refining comes in a variety of uses. It is obtained as a product of changing silicates due to hot groundwater in sulfur veins and in their vicinity, as well as in hot springs and geysers.


In pharmacy and in the preparation of refractory bricks, porcelain and ceramics are used as bleach. For making porcelain dishes and in chemical porcelain for valves, pipes and tubes, accessories and accessories, as lining of furnaces, electrical insulation, as paint and filler in paints, rubbish in plastics, as Saya, glaze of pottery, adsorbent is used in oil refining. Kaolin is used as a neutral colloidal dye in paints. This powder is hydrophobic but has good compatibility in oils and many Organic solvents.

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