Martyite
Martyite is an IMA-recognized mineral species in the vanadate class, with the chemical formula Zn₃V₂O₇(OH)₂·2H₂O.
It crystallizes in the hexagonal crystal system (space group P-3m1). It is a member of the Volborthite structural group.
Key properties: Mohs hardness 3; specific gravity 3.37; Pale yellow-orange streak; Adamantine luster; optically uniaxial.
IMA symbol Myi, IMA status: approved, named in 2007.
Product of groundwater leaching and oxidation of vanadium oxides in a post-mining environment.
It is found associated with Gypsum, rossite, pyrite, montroseite, magnesiopascoite.
The mineral was named to honor Joe Marty (b. 1945) for his contributions to mineralogy.
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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