http://resource.geosciml.org/classifier/cgi/commodity-code/alunite
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definition | A trigonal hydrated aluminium potassium, sulfate mineral, KAl3(SO4)2(OH)6 mined for the manufacture of alum. | ||||||
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source | http://www.webmineral.com/data/Alunite.shtml http; http://en.wikipedia.org/wiki/Alunite | ||||||
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in scheme | commodity-code original |