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brochantite

[broh-shahn-tahyt] /broʊˈʃɑn taɪt/
noun
1.
a mineral, hydrous copper sulfate, Cu 4 (OH) 6 SO 4 , occurring in green fibrous masses and similar in physical properties to antlerite: formerly a major ore of copper.
Origin
1860-1865
1860-65; named after A. Brochant de Villiers (1773-1840), French mineralogist; see -ite1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Article for brochantite

a copper sulfate mineral, its chemical formula being Cu4SO4(OH)6. It is ordinarily found in association with malachite, azurite, and other copper minerals in the oxidized zone of copper deposits, particularly in arid regions. The mineral occurs in such locations as Nassau, Ger.; Rio Tinto, Spain; Krisuvik, Ice.; and the southwestern United States. Brochantite is abundant in Arizona and Chile. For detailed physical properties, see sulfate mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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