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. Rocks that are rich in kaolinite are known as china clay or kaolin.The name is derived from Gaolin 高岭("High Hill") in Jingdezhen, Jiangxi province, China. Kaolinite was first described as a mineral species in 1867 for an occurrence in the Jari River basin of Brazil.Kaolinite is one of the most common minerals; it is mined, as kaolin, in Brazil, France, United Kingdom, Germany, India, Australia, Korea , the People's Republic of China, and the USA.
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Noun
1. a mineral consisting of aluminum silicate; main source of kaolin
(hypernym) mineral

n. kaolinite

General Information:
 Chemical Formula:
Al2Si2O5(OH)4
 Composition:
(Molecular Weight = 258.16 gm)
Aluminum 20.90 % Al
Silicon 21.76 % Si
Hydrogen 1.56 % H 
Oxygen 55.78 % O 
 Empirical Formula:
Al2Si2O5(OH)4
 Locality:
Kao-Ling, China.
 Name Origin:
Named after the locality.
Physical Properties:
 Cleavage:
[001] Perfect
 Color:
white, brownish white, grayish white, yellowish white, or grayish green.
 Density:
2.6
 Diaphaniety:
Transparent to translucent
 Habits:
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., ,
 Hardness:
1.5-2 - Talc-Gypsum
 Luminescence:
None.
 Luster:
Earthy (Dull)
 Streak:
white
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kaolinite
danh từ caolinit
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