IMA mineral species

Magnesio-arfvedsonite

NaNa₂(Mg₄Fe³⁺)Si₈O₂₂(OH)₂

Amphibole, double chain inosilicate mineral.

Magnesio-arfvedsonite specimen
Magnesio-arfvedsonite2108.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formulaNaNa₂(Mg₄Fe³⁺)Si₈O₂₂(OH)₂
ElementsNa, Mg, Fe, Si, O, H
Crystal systemMonoclinic
Mohs hardness—
Density—
Streak—
Color—
IMA symbolMarf
Nickel–Strunz class9.DE.25

“—” means no reliable value in Wikidata yet. Check Mindat for full data.

🌍 Where it's found

Type locality (where it was first described): Hpakant-Tawmaw jade tract, Myanmar