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Cu4(SO4)(OH)6
Monoclinic
Brochantite, a copper sulfate hydroxide mineral, was reported from Sterling Hill by Cook (1973), who described it occurring as dark green crystals associated with linarite, devilline, and gypsum as secondary minerals on chalcocite and galena, which in turn encrust calcite containing magnetite, apatite, and garnet.
It is distinguished from malachite by the lack of effervescence in HCl. Brochantite has been noted by the writer from a number of minor Sterling Hill secondary assemblages, forming in most cases from the alteration of chalcocite (see also Jenkins and Misiur, 1994). It has not been reported from Franklin.
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| Copyright © 1995 by Pete J. Dunn |
Website
by Herb Yeates
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Link
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This
page created: January 11, 2001 |
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