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Mineralpedia Details for Kamotoite-(Y)

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Kamotoite-(Y)

Kamotoite-(Y)

Named after the town of Kamoto, and the Kamoto mine in the Democratic Republic of the Congo where the mineral gets its type locality. Kamotoite is a rare mineral that forms in oxidized uranium-bearing copper-cobalt deposits. It can be found in additional localities in Switzerland, Norway, Germany, the Czech Republic, and Canada. Kamotoite is radioactive.

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

Formula
Y2O4(UO2)4(CO3)3ยท14H2
Crystal System
Monoclinic 
Crystal Habit
Encrustations 
Cleavage
Good, Distinct, None 
Luster
Vitreous (Glassy) 
Color
yellow, bright yellow 
Class
Monoclinic - Prismatic 
Hardness
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Kamotoite-(Y) from Kamoto East mine, Kolwezi, Katanga, Democratic Republic of Congo

Kamotoite-(Y)
            from Kamoto East mine, Kolwezi, Katanga, Democratic Republic of Congo

The Kamotoite is the yellow cluster shown in the third photo. It forms flat feather-like crystals in an 8m area. In-hand the Kamotoite is opaque and pastel yellow. 

Click thumbnail images for larger view.

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