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Mineralpedia Details for Clinotyrolite

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Clinotyrolite

Clinotyrolite

Named for its place in the monoclinic crystal system and for the relationship to the mineral tyrolite, which at the time was believed to be in the orthorhombic system. As tyrolite has since been found to also be monoclinic, the status of clinotyrolite is currently unclear. Flat, elongate, emerald-green crystals in radiated and foliated aggregates. Commonly found in the oxidized zone of copper deposits, Clinotryolite can be found in localities in the USA, China, Germany, France, and Ireland, among several others.

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

Formula
Ca2Cu9[(As,S)O4]4(OH)10*10(H2O) 
Crystal System
Monoclinic 
Crystal Habit
Radial, Foliated 
Luster
Silky - Pearly 
Color
emerald green 
Streak
light green 
Class
Monoclinic - Prismatic 
Hardness
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Clinotyrolite from Lovelock mine, Churchill Co., Nevada, United States

Clinotyrolite
            from Lovelock mine, Churchill Co., Nevada, United States

Tiny sprays of acicular crystals to maybe 0.1mm.

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