Fluoro-pargasite
Fluoro-pargasite is an IMA-recognized mineral species in the silicate class, with the chemical formula NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂F₂.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Amphibole structural group.
Key properties: Mohs hardness 6; specific gravity 3.18; Gray to greenish gray streak; Vitreous luster; optically biaxial.
IMA symbol Flprg, IMA status: approved, named in 2003.
Found in granulite facies metacarbonate rocks.
It is found associated with Calcite, actinolite, titanite, phlogopite, diopside.
Signifies an amphibole in the compositional range of pargasite with F > OH in the W structural site.
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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