Metacalciouranoite
Metacalciouranoite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula (Ca,Na,Ba)U₂O₇·2H₂O.
It is a member of the Wölsendorfite structural group.
Key properties: specific gravity 4.9; optically biaxial.
IMA symbol Mcu, IMA status: approved, named in 1971.
Found in the oxidation zone of a U-Mo deposit, replacing "pitchblende", and being replaced by uranophane.
It is found associated with Uraninite, uranophane, bauranoite, calciouranoite, protasite.
As a lower hydrate of calciouranoite.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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