| 1. | Clarkeite forms by oxidation and replacement of uraninite late during pegmatite crystallization.
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| 2. | It occurs as a secondary mineral as a weathering product of uraninite.
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| 3. | Ore minerals are coffinite, uraninite, and uranium-bearing apatite.
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| 4. | Ore consists of uraninite with lesser brannerite and thucholite.
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| 5. | Boltwoodite occurs as secondary silicate alteration crusts surrounding uraninite and as fracture fillings.
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| 6. | Small amounts of helium are also present in uraninite as a result of alpha decay.
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| 7. | The uraninite here was conglomerated with garnet.
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| 8. | It occurs associated with uraninite, becquerelite, fourmarierite, phosphouranylite, gypsum and fluorite.
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| 9. | All uraninite minerals contain a small amount of radium as a radioactive decay product of uranium.
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| 10. | Uranium minerals in the Witwatersrand deposits are typically uraninite with lesser uranothorite, brannerite, and coffinite.
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