Pharmazincite
Pharmazincite is an IMA-recognized mineral species in the arsenate class, with the chemical formula KZn(AsO₄).
It crystallizes in the hexagonal crystal system (space group P6_3). It is a member of the Tridymite-Nepheline structural group.
Key properties: specific gravity 4.748; Vitreous luster; optically uniaxial.
IMA symbol Pznc, IMA status: approved, named in 2014.
A minor constituent of sublimate incrustations (360-380° C) near a volcanic fumarole.
It is found associated with Shchurovskyite, dmisokolovite, bradaczekite, arsmirandite, tilasite, johillerite, tenorite, hematite, aphthitalite, As-bearing orthoclase.
An acronym for its essential chemical composition, arsenic (from the Greek jαρμακου, for poison) and zinc.
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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