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Mineralpedia Details for Yukonite

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Yukonite

Yukonite

Named for Yukon Territory, the territory in Canada from which it was first found, Yukonite is a secondary mineral that is typically altered from arseopyrite. Found in few localities worldwide, including Canada, USA in New Jersey and Colorado, Germany, and Poland. When fresh, Yukonite may decrepitate, or crackle when exposed to air, water, or heat. This process causes the evolution of carbon dioxide.

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

Formula
Ca7Fe3+15(AsO4)9O16ยท25H2
Crystal System
No Crystals 
Crystal Habit
Amorphous 
Luster
Resinous 
Color
brownish black, dark red, reddish brown 
Streak
light brown 
Class
Amorphous - No Crystals 
Hardness
2-3 
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Yukonite from Dolores prospect, Pastrana, Mazarrón-Águilas, Murcia, Spain

Yukonite
            from Dolores prospect, Pastrana, Mazarrón-Águilas, Murcia, Spain Dark brown spherules to less than 0.3mm thick crustations and patchy.
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