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Bentonite why called "universal soil"
   Bentonite is non-metallic mineral montmorillonite as the main mineral composition, the structure of montmorillonite is 2:1 type crystal structure consists of two silicon oxygen tetrahedron sandwiching a layer of alumina eight face body, due to the layered structure of montmorillonite crystal formation in the presence of some cations, such as Cu, Mg, Na, K etc, and these cations and montmorillonite cell function is not strong, easily by other cation exchange, it has good ion exchange. Has been applied abroad in the industry and agriculture production 24 areas more than 100 departments, there are more than 300 products, so people called the "universal soil".