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Brochantite
Brochantite
is a
sulfate
mineral
, one of a number of
cupric sulfates
. Its chemical formula is Cu
4
SO
4
(OH)
6
. Formed in arid climates or in rapidly oxidizing copper sulfide deposits, it was named by
Armand Lévy
for his fellow
Frenchman
,
geologist
and
mineralogist
A. J. M. Brochant de Villiers
.
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