معلومات عن الكوالين

[center]Kaolinite
Kaolinite is a clay mineral with the chemical composition Al2Si2O5(OH)4. It is a layered silicate mineral, with one tetrahedral sheet linked through oxygen atoms to one octahedral sheet of alumina octahedra (Deer et al., 1992). Rocks that are rich in kaolinite are known as china clay or kaolin.

Kaolin is used in ceramics, medicine, coated paper, as a food additive, in toothpaste, as a light diffusing material in white incandescent light bulbs, and in cosmetics.
It is also used in in paint to extend titanium dioxide (TiO2) and modify gloss levels; in rubber for semi-reinforcing properties and in adhesives to modify rheology.[5]
The largest use is in the production of paper, including ensuring the gloss on some grades of paper. Commercial grades of kaolin are supplied and transported as dry powder, semi-dry noodle or as liquid slurry.
A more recent, and more limited, use is as a specially formulated spray applied to fruits, vegetables, and other vegetation to repel or deter insect damage. A traditional use is to soothe an upset stomach, similar to the way parrots (and later, humans) in South America originally used it.[6] Until the early 1990s it was the active substance of anti-diarrhea medicine Kaopectate.
In April of 2008, the Naval Medical Research Center announced the successful use of a Kaolinite-derived aluminosilicate nanoparticles infusion in traditional gauze known commercially as QuikClot® Combat Gauze.[7] [8].
Category Mineral

Chemical formula
Al2Si2O5(OH)4
Identification
Color White, sometimes red, blue or brown tints from impurities
Crystal habit
Earthy
Crystal system
triclinic

Cleavage
perfect on {001}
Fracture
Perfect
Mohs Scale hardness 2 - 2.5
Luster
dull and earthy
Refractive index
α 1.553 - 1.565, β 1.559 - 1.569, γ 1.569 - 1.570
Streak
white
Specific gravity
2.16 - 2.68
1)
Kaoline
AL2O3 36:37%
SiO2 47:44%
I.O.L 13:14%

That’s our SPECIFICATIONS for kaolin from our mins