Where are the main differences between kaolin and kaolinite?
There are three types of kaolinite subgroup, including kaolinite, crust stone and Pearl stone. Their theoretical formula is Al[Si4O10] (OH) 8, without water between layers.
Kaolin is a nonmetallic mineral, a kind of clay and clay rock mainly composed of kaolinite group clay minerals. Because of the white and delicate, also known as "white cloud soil.". [1] was named after kaolin village in Jiangxi, Jingdezhen province.Its pure kaolin is white, fine and soft, and it has good plasticity and fire resistance. The mineral composition is mainly composed of mineral kaolinite, halloysite, illite, illite, montmorillonite and quartz, feldspar etc.. Kaolin is widely used, mainly used for papermaking, ceramics and refractories, secondly used in coating, rubber filler, enamel glaze and white cement raw materials, a small amount of paint, paint, plastic, used for grinding wheel, pencil, soap, cosmetics, pesticide, medicine, textile, petroleum, chemical industry, building materials, defense and other industrial sectors.
Kaolin pure white, because of impurities can be dyed other colors. Aggregate dull or waxy. Extremely cleavage, hardness 2.0~3.5, relative density 2.60~2.63. Dense block with a rough sense, dry with water absorption, wet state of plasticity, but water does not expand.
The English name for kaolinite is kaolinite and the oxide form is 2Al2O3.4SiO2.4H2O. A product of natural alteration of feldspar and other silicate minerals; an hydrous silicate. Kaolinite is a dense or loose mass, usually white. If it contains impurities, it is beige.
