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March 8, 2014
Table of Contents
1 Introduction
Kaolinite

Wikipedia

 
Image:KaolinUSGOV.jpg|thumb|Kaolin
Image:KaoliniteUSGOV.jpg|thumb|Kaolinite (Aluminium Silicate Hydroxide)
Kaolinite is a mineral with the chemical composition Aluminium|Al<sub>2</sub>Silicon|Si<sub>2</sub>Oxygen|O<sub>5</sub>(hydroxide|OH)<sub>4</sub>. It is a layered silicate mineral, with one tetrahedron|tetrahedral sheet linked through oxygen molecules to one octahedron|octahedral sheet of alumina octahedra. It is also known as china (pottery)|china clay and kaolin (高嶺土 in pinyin: gao1 ling3 tu3), named after Gaoling ("High Hill"), Jingde Town, Jiangxi, China.

It is a soft, earthy, usually white mineral (dioctahedral phyllosilicate clay), produced by the chemical weathering of feldspar. In many parts of the world, it is colored pink-orange-red by iron oxide, giving it a distinct rust hue. Lighter concentrations yield a yellow or light orange colour. Alternating layers are sometimes found, as at Providence Canyon State Park in Georgia (state)|Georgia, United States|USA.

Kaolinite is one of the most common minerals, it is mined in France, United Kingdom|Britain, Germany, Japan (Amakusa), China, and the southeastern U.S. states of Georgia, Florida, and, to a lesser extent, South Carolina. Due to its extremely fine nature (finer than silt), it is mixed with water and transported in tanks as a liquid slurry. It is used in ceramics, medicine, bricks, paper, as a food additive, in toothpaste, and in cosmetics. A recent 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 use it.

The crystallography of kaolinite played a role in Linus Carl Pauling|Linus Pauling's work on the nature of the chemical bond.



  • http://mineral.galleries.com/minerals/silicate/kaolinit/kaolinit.htm The Mineral KAOLINITE - Mineral Galleries

  • http://www.engelhard.com/Lang1/xDocIDAE202ECC146E4CEEB7E5D42B0DD344F3/xDocTable_SubSiteContent/TechnologyClassIDA875622687D847BB98C4CDA16E9ABC3A/TechnologyID08485B94CB8C44B2A8E3E9B30AC1EC84/SubSiteIDC5F296B401FE4C318CE02D99D571EAF9 Engelhard particle film technology - commercial site - insect deterent

  • http://cogweb.ucla.edu/Abstracts/Diamond_99.html Evolutionary biology: Dirty eating for healthy living

  • http://www.georgiaencyclopedia.org/nge/Article.jsp?id=h-998 Kaolin in Georgia


See also: List of minerals, porcelain

Category:Minerals
Category:Silicate minerals

bg:Каолин
ca:Caol?
de:Kaolinit
ja:カオリナイト

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Kaolinite".


Last Modified:   2005-04-13


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