| Name | Composition | Remarks |
|---|---|---|
| Uraninite, Cleveite, Bröggerite, Nivenite, Pitchblende | Oxides of uranium and lead. Usually contains thorium, other rare earths and helium. Uranium 50-80%. Thorium 0–10% | Occurs primary as a constituent of rocks and secondary in veins with metalliferous sulphides |
| Gummite | (Pb, Ca) U 3 SiO 12 . 6H 2 O? Uranium 50–65% | An alteration product of uraninite. Formed by the action of percolating waters |
| Uranophane, Uranotil | CaO . 2UO 3 . 2SiO 2 . 6H 2 O Uranium 44–56% | An alteration product of uraninite through gummite |
| Carnotite | A vanadate of uranium and potassium. Uranium 42–51% | Occurs as a secondary mineral impregnating a porous, sedimentary sandstone. Found in Colorado and Utah |
| Uranosphaerite | Bi 2 O 3 . 2UO 3 . 3H 2 O. Uranium 41% | Alteration product of other uranium minerals |
| Torbernite, Cuprouranite | CuO . 2UO 3 . P 2 O 5 . 8H 2 O. Uranium 44–51% | „ „ |
| Autunite, Calciouranite | CaO . 2UO 3 . P 2 O 5 . 8H 2 O. Uranium 45–51% | „ „ |
| Uranocircite | BaO . 2UO 3 . P 2 O 5 . 8H 2 O. Uranium 46% | „ „ |
Table of Contents
APPENDIX B. RADIO-ACTIVE MINERALS.
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