Parawulffite
Parawulffite is an IMA-recognized mineral species in the sulfate class, with the chemical formula K₅Na₃Cu₈O₄(SO₄)₈.
It crystallizes in the monoclinic crystal system (space group P2/c).
Key properties: Mohs hardness 2.5; specific gravity 3.35; Light green streak; Vitreous luster; optically biaxial.
IMA symbol Pwlf, IMA status: approved, named in 2013.
Occurs as sublimates at a fumarole as incrustations on the surface of basalt scoria or on tenorite or aphthitalite crusts.
It is found associated with Euchlorine, fedotovite, tenorite, alumoklyuchevskite, langbeinite, calciolangbeinite, chalcocyanite, steklite, orthoclase (As-bearing variety).
Recognizes with the prefix para, from the Greek παρά for near, the similarity to wulffite.
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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