Volaschioite
Volaschioite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Fe₄(SO₄)O₂(OH)₆·2H₂O.
It crystallizes in the monoclinic crystal system (space group C2/m).
Key properties: specific gravity 3.03; Orange streak; Vitreous to resinous luster.
IMA symbol Vsh, IMA status: approved, named in 2010.
An oxidation product of pyrite in tunnels through a magnetite-pyrite deposit.
It is found associated with Pyrite, fibroferrite, goethite, melanterite, römerite.
Derived from the ancient name for the first known locality, believed to be derived from forno (furnace) and Volaschio (a locally significant proper noun).
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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