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Brochantite
Cu4(SO4)(OH)6

     Brochantite is relatively rare at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually red.
Luster is dull.
Diaphaneity is opaque.
Crystal System is monoclinic; P21/a.
Crystal Habits include altered red masses.
Cleavage not observed.
Fracture is uneven to conchoidal.
Hardness is 3.5 - 4.
Specific Gravity is approximately 3.97 g/cm3.
Streak is pale green.
Associated Minerals include (??).
Distinguishing Features: Crystal habit and color.
Origins: Named in 1824 after A. J. M. Brochant de Villiers (1772-1840),
   French geologist and mineralogist.

CLASSIFICATION:

Dana System
# 30.1.3.1

Strunz Classification
# VI/B.1-30

REFERENCES:
Dana 8:623-624 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

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