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Mineralpedia Details for Macquartite

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Macquartite

Macquartite

Named after the French chemist Louis Charles Henri Macquart who brought the Russian specimens of crocoite from which chromium was discovered to France. Macquartite is found in only one locality at the Mammoth-St. Anthony mine in Tiger, Arizona in the United States. It occurs on museum specimens from an oxidized lead-copper-zinc orebody.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/macquartite.pdf

Formula
Cu2Pb7(CrO4)4(SiO4)2(OH)2 
Crystal System
Monoclinic 
Crystal Habit
Euhedral Crystals 
Cleavage
Good, None, None 
Luster
Adamantine 
Color
orange 
Streak
light orange 
Class
Monoclinic - Prismatic 
Hardness
3.5 
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Macquartite from Mammoth mine, Tiger, Pinal Co., Arizona, United States

Macquartite
            from Mammoth mine, Tiger, Pinal Co., Arizona, United States

Yellow acicular sprays to 0.75mm. Joe Ruiz collection.

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