It occurs associated with uraninite, becquerelite, fourmarierite, phosphouranylite, gypsum and fluorite.
2.
Becquerelite contains about 70 % Uranium in it and is mainly mined in Kasolo, Zaire.
3.
In addition to uraninite it occurs associated with the rare minerals becquerelite, masuyite, schoepite, kasolite, curite, boltwoodite, vandendriesscheite, billietite, metatorbernite, fourmarierite, studtite and sklodowskite.
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