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Formula: Cu2Ce2(UO2)(CO3)5(OH)2.1.5H2O
Hydrated carbonate, uranyl and
cerium-bearing mineral
Crystal System: Hexagonal
Specific gravity:
Hardness: 2 to 3
Streak:
Colour: Pale blue, bright blue, blue-green
Solubility: Effervescent in 1:10 hydrochloric acid
Common impurities:
Environments
Astrocyanite is an oxidation product of uraninite
Localities
At the East Kamoto deposit, Zaire, astrocyanite is associated with
uranophane, kamotoite-(Y),
francoisite-(Nd),
shabaite-(Nd), schuilingite
and masuyite
(Dana).
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