Pseudojohannite
Pseudojohannite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Cu₃(OH)₂[(UO₂)₄O₄(SO₄)₂]·12H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: specific gravity 4.31.
IMA symbol Pjh, IMA status: approved, named in 1997.
A secondary mineral formed by the interaction of acidic sulfate mine water with uraninite or uranyl silicate minerals.
It is found associated with Johannite, uranopilite, gypsum, uraninite, pyrite, tennantite, chalcopyrite (Jáchymov, Czech Republic); coal, uraninite, chalcocite (Widowmaker mine).
Expresses a chemical and paragenesis relation to johannite.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
Browse more P minerals or help write this entry.