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Mineralpedia Details for Torbernite

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Torbernite

Torbernite

Named after Torbern Olof Bergmann, chemist, mineralogist, and a Professor of Chemistry at Uppsala University in Uppsala, Sweden. Torbernite is an uncommon mineral found at hundreds of localities although not usually in large amounts. It is a secondary mineral that forms in the oxidized zones of uranium-bearing copper deposits. The water content of Torbernite can vary with the relative humidity of the atmosphere. Torbernite is radioactive.

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

Formula
Cu(UO2)2(PO4)2ยท12H2
Crystal System
Tetragonal 
Crystal Habit
Tabular, Earthy, Foliated 
Cleavage
Perfect, Distinct, None 
Luster
Vitreous - Pearly 
Color
green, grass green, leek green, apple green, siskin green 
Streak
pale green 
Class
Tetragonal - Ditetragonal Dipyramidal 
Fracture
Brittle 
Hardness
2-2.5 
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Torbernite from Wheal Basset, Redruth - St Day dist., Cornwall, England

Torbernite
            from Wheal Basset, Redruth - St Day dist., Cornwall, England

Opaque green, tabular and modified crystals to 1mm.

Light pastel green, thin, platy - square to modified crystals to 1.5mm.

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Torbernite from Redruth, Cornwall, England

Torbernite
            from Redruth, Cornwall, England Tabular crystal to 2mm.
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Torbernite from Laluz, Sonora, Mexico

Torbernite
            from Laluz, Sonora, Mexico Green tabular crystals to 0.5mm.
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Torbernite from San Salvador pit, Tyrone mine, New Mexico, United States

Torbernite
            from San Salvador pit, Tyrone mine, New Mexico, United States Pastel green thin tabular crystals in rosettes to parallel plates to 0.5mm.
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Torbernite from Branchville, Fairfield Co., Connecticut, United States

Torbernite
            from Branchville, Fairfield Co., Connecticut, United States
Special Info
Radioactive!!

Green crystal plates of Torbernite, less than 1mm, on Quartz. 

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Torbernite from St. Just dist., Cornwall, England

Torbernite
            from St. Just dist., Cornwall, England

Tiny, less than 1mm, green, square plates.

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Torbernite from San Antonio de la Huerta, Sonora, Mexico

Torbernite
            from San Antonio de la Huerta, Sonora, Mexico

Pastel green thin tabular crystals to 1mm.

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