Torbernite (Cu(UO₂)₂(PO₄)₂·8–12H₂O) is the copper-uranyl phosphate — the radioactive companion of autunite (Ca-uranyl). Vivid green tabular crystals are diagnostic. Forms in oxidized cap zones of uranium-bearing pegmatites and granites. Highly radioactive — collector specimens require shielded storage and care.
Key Facts
- Mohs hardness 2–2.5.
- Tetragonal; thin tabular crystals on basal pinacoid.
- Vivid emerald to grass-green color from Cu + UO₂.
- Highly radioactive — store shielded.
- Common alteration product of uraninite in oxidized cap zones.
Notable Localities
Cornwall (England) and Margnac (France) are historic European sources. Musonoi Mine (DR Congo) supplies modern collector specimens. Mt. Painter (South Australia) yields Australian material.
Found at these Localities
- Erzgebirge / Krušné Hory (埃尔茨山脉/克鲁什内山(德捷边境矿带))
- Cornwall Mining District (康沃尔矿区)
