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What (who) is KAOLIN - definition

LAYERED ALUMINOSILICATE 1:1 CLAY MINERAL

Kaolin; China clay; Kaolinlte; Kaolin clay; Lithomarge; Kaolinite clay; China Clay; Calaba; Calabachop; White dirt; ATC code A07BC02; ATCvet code QA07BC02; Kaolisol; Kaolinization; Kalaba (clay); Georgia red clay; Georgia Red Clay; Kaolinisation; Bolus alba; China-clay

Kaolin

A product of decomposition of feldspar, consisting approximately of silica, 45, alumina, 40, water, 15. It was used in electric candles of the Jablochkoff type as a constituent of the insulating layer or colombin. Later it was abandoned for another substance, as it was found that it melted and acted as a conductor.

kaolin

['ke??l?n]

¦ noun a fine, soft white clay, used for making porcelain and china and in medicinal absorbents.

Derivatives

kaolinize or kaolinise verb

Origin

C18: from Fr., from Chin. gaoli?ng, lit. 'high hill', the name of a mountain in Jiangxi province where the clay is found.

Kaolin

·noun ·Alt. of Kaoline.

Wikipedia

Kaolinite

Kaolinite ( KAY-ə-lə-nyte, -⁠lih-) is a clay mineral, with the chemical composition Al₂Si₂O₅(OH)₄. It is a layered silicate mineral, with one tetrahedral sheet of silica (SiO₄) linked through oxygen atoms to one octahedral sheet of alumina (AlO₆) octahedra.

Kaolinite is a soft, earthy, usually white, mineral (dioctahedral phyllosilicate clay), produced by the chemical weathering of aluminium silicate minerals like feldspar. It has a low shrink–swell capacity and a low cation-exchange capacity (1–15 meq/100 g).

Rocks that are rich in kaolinite, and halloysite, are known as kaolin () or china clay. In many parts of the world kaolin is colored pink-orange-red by iron oxide, giving it a distinct rust hue. Lower concentrations yield white, yellow, or light orange colors. Alternating layers are sometimes found, as at Providence Canyon State Park in Georgia, United States.

Kaolin is an important raw material in many industries and applications. Commercial grades of kaolin are supplied and transported as powder, lumps, semi-dried noodle or slurry. Global production of kaolin in 2021 was estimated to be 45 million tonnes, with a total market value of $US4.24 billion.

https://en.wikipedia.org/wiki/Kaolinite

Examples of use of KAOLIN

1. CVRD, which has a presence in 16 countries on five continents, is also an important global producer of copper, bauxite, alumina, aluminum, potassium, kaolin, manganese and iron alloys.

2. Olive oil didn‘t used to be a subject of conversation, certainly not a culinary ingredient÷ it was something kept behind the counter at the chemist‘s, along with kaolin and morphine and syrup of figs.

3. Rather than use commercially made glazes, Aysel mixes her own, from kaolin, copper oxide, aluminum and assorted other chemicals. «That‘s all very technical, I‘m not sure anyone would be interested,» she paused, when I asked her about the different materials she used to produce the tremendous variety of blues and greens and turquoises that shimmer translucently on the surfaces of her flasks and bowls.