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tenorite
Tenorite is a copper oxide mineral with the simple formula CuO.
==Occurrence==
Tenorite occurs in the weathered or oxidized zone associated with deeper primary copper sulfide orebodies. Tenorite commonly occurs with chrysocolla and the copper carbonates, azurite and malachite. The dull grey-black color of tenorite contrasts sharply with the often intergrown blue chrysocolla. Cuprite, native copper and Fe–Mn oxides also occur in this environment.〔
In addition to the hydrothermal, tenorite also occurs as a volcanic sublimate from Vesuvius, Campania, and Etna, Sicily, Italy. As a sublimate it occurs with copper chlorides, alkali chlorides and cotunnite.〔 The Vesuvian sublimate occurrence was originally named ''melaconise'' or ''melaconite'' by F. S. Beudant in 1832.〔Chisholm, Hugh, ed. (1911). Encyclopædia Britannica (11th ed.). Cambridge University Press〕
Tenorite was named in 1841 after the Italian botanist Michele Tenore (1780-1861).〔
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