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Silicate

Vanadio-pargasite

NaCa₂(Mg₄V)(Si₆Al₂)O₂₂(OH)₂
Hardness752–824
Crystal systemMonoclinic
ClassSilicate
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Vanadio-pargasite

Vanadio-pargasite is an IMA-recognized mineral species in the silicate class, with the chemical formula NaCa₂(Mg₄V)(Si₆Al₂)O₂₂(OH)₂.

It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Amphibole structural group.

Key properties: Mohs hardness 752–824; specific gravity 3.05; Pale green streak; Vitreous luster; optically biaxial.

IMA symbol Vprg, IMA status: approved, named in 2017.

developed during prograde (granulite-facies) metamorphism of Cr-V-bearing calcite-dolomite and siliceous sediments.

It is found associated with Magnesiocoulsonite-magnesochromite, Cr-V-rich spinel, phlogopite, forsterite, Cr-V-bearing diopside, chlorite.

As a vanadium-bearing analog of pargasite, a monoclinic amphibole with Ca dominant as the B cation.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more V minerals or help write this entry.