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Metacalciouranoite: (Ca,Na,Ba)U2O7·2(H2O) Calciouranoite: (Ca,Ba,Pb)U2O7·5(H2O)
Comments: Cryptocrystalline looking, greasy yellow blotches, of amorphous calciouranoite (probably, in part, dehydrated to matacalciouranoite).
Location: Oktyabr'skoye Mo-U deposit, east Transbaikal region, Russia.
Scale: See Image.
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