Minerals identify

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Torbernite

Phosphate mineral

Torbernite, whose name derives from the Swedish chemist Torbern Bergman, hydrated green copper uranyl phosphate , found in granites and other uranium-bearing deposits as a secondary mineral. Torbernite is isostructural with the related uranium mineral, autunite.

The chemical formula of torbernite is similar to that of autunite in which a Cu2+ cation replaces a Ca2+. The number of water hydration molecules can vary between 12 and 8, giving rise to the variety of metatorbernite when torbernite spontaneously dehydrates. Their respective chemical compositions are the following: Torbernite Cu(UO2)2(PO4)2 • 12H2O Metatorbernite Cu(UO2)2(PO4)2 • 8H2O

Torbernite's most common alternative names are copper uranite and cupro-uranite.

Identification

Color of mineral

Green

Mohs scale ( mineral hardness )

2

The streak

Green

Density ( specific gravity )

1.59
1.581

Luster ( interacts light )

Pearly
Vitreous

Crystal ( diaphaneity )

Tetragonal

Radioactive

Radioactive