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Crookesite is a selenide mineral composed of copper and selenium with variable thallium and silver. Its chemical formula is reported either as Cu7(Tl,Ag)Se4 or (Cu,Tl,Ag)2Se. It is formed by precipitation from hydrothermal fluids.
Additional recommended knowledge
It was discovered in 1866 in Skrikerum, Sweden and named for Sir William Crookes (1832-1919), the discoverer of the element thallium.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Crookesite". A list of authors is available in Wikipedia.|