Zincovoltaite
Zincovoltaite is an IMA-recognized mineral species in the sulfate class, with the chemical formula K₂Zn₅Fe³⁺₃Al(SO₄)₁₂·18H₂O.
It crystallizes in the cubic crystal system (space group Fd3c). It is a member of the Voltaite structural group.
Key properties: Mohs hardness 3; specific gravity 2.765; Grayish green streak; Vitreous on crystal surfaces, pitchy to resinous luster.
IMA symbol Zvlt, IMA status: approved, named in 1985.
Found in the oxidation zone of a Zn–Pb–Fe sulfide deposit, formed in an arid climate.
It is found associated with Römerite, melanterite, gypsum, pyrite, quartz.
As the zinc analog of voltaite.
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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