aluminium silicate materials
Part of the SiO4 tetrahedra in the silicate replaced by AlO4 tetrahedron composed of aluminum silicate, as orthoclase KAlSi3O8. Can also be written as K [(AlO2) (SiO2) 3], that a quarter of the oxygen-containing tetrahedral aluminum atoms occupy, anorthite CaAl2SiO8 of Ca [(AlO2) 2 (SiO2) 2] half of which is AlO4 tetrahedron, the other half of the SiO4 tetrahedron. Natural zeolite zeolite (Na2O · Al2O3 · 2SiO2 · nH2O) is an aluminum silicate containing water of crystallization, is a new type of highly selective adsorbents can be used for separation of gases or liquids. By sodium silicate, partial sodium aluminate and sodium hydroxide mixed in a certain proportion, dehydration, drying derived zeolite finished. Zeolite molecular sieves in a variety of heterogeneous reactions also heavily used as a catalyst or catalyst carrier.
Silicate mineral species and are very widespread, accounting for about a quarter of the total number of mineral species. Constitute 75% of the total weight of the crust. Aluminum silicates in silicate accounts for a significant proportion of the connection of the silicon-oxygen tetrahedron in the crystal structure and the formation of five types of anion (island anion ring anion chain anion , layered anion, frame-like anion) by the anion composition of the salt has aluminum silicate exist.
Aluminium silicate materials uses: used as raw materials for manufacture of refractories, glass, cement, ceramics.
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