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carnotite




carnotite
Carnotite. Image source: Wikipedia
A soft, yellow, radioactive mineral (see radioactivity), potassium uranyl vanadate (K2[UO2]2[VO4]2.nH2O), a major ore of uranium and vanadium. It is found in Colorado, Wyoming, South Dakota, Pennsylvania, Siberia, Zaire, and Australia as yellow-green crusts or cavity fillings in sandstone and in fossilized wood. It is finely crystalline (monoclinic), dull or earthy. Relative density 3–5.


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