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Mineralpedia Details for Yvonite

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Yvonite

Yvonite

Named after Professor of Crystallography at Geneva University in Geneva, Switzerland, Klaus Yvon.  Yvonite is found in only two countries Worldwide, France and the Czech Republic and takes its type locality from the Salsigne mine in France. There, it is formed as a secondary mineral on samples from gold-bearing arsenic sulfide mine dumps.

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

Formula
Cu(AsO3OH)ยท2H2
Crystal System
Triclinic 
Crystal Habit
Radial, Spherical 
Cleavage
Perfect, Poor, None 
Luster
Vitreous (Glassy) 
Color
turquoise blue 
Streak
blue 
Class
Triclinic - Pinacoidal 
Fracture
Brittle - Irregular 
Hardness
3.5-4 
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Yvonite from Salsigne mine, Salsigne, Aude, France

Yvonite
            from Salsigne mine, Salsigne, Aude, France

Bright sky blue tiny, platy crystals to about 0.3mm as singles and half-rosettes in aggregate on light blue fibrous Pushcharovskite.

Click thumbnail images for larger view.

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