http://resource.geosciml.org/classifier/cgi/commodity-code/sillimanite
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| definition | Orthorhombic Al2SiO5 aluminium neosilicate mineral occurring in aluminous metamorphic rocks used in the manufacture of high alumina refractories or alumina bricks. | ||||||
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| source | http://www.webmineral.com/data/Sillimanite.shtml http://en.wikipedia.org/wiki/Sillimanite | ||||||
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| in scheme | commodity-code original | ||||||