IMA mineral species

Magnesioneptunite

KNa₂Li(Mg,Fe)₂Ti₂Si₈O₂₄

Transitional structure between phyllosilicate and other silicate unit, mineral.

Magnesioneptunite specimen
Magnesioneptunite.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formulaKNa₂Li(Mg,Fe)₂Ti₂Si₈O₂₄
ElementsK, Na, Li, Mg, Fe, Ti, Si, O
Crystal systemMonoclinic
Mohs hardness—
Density—
Streak—
Color—
IMA symbolMnpt
Nickel–Strunz class9.EH.05

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

🌍 Where it's found

Type locality (where it was first described): Mount Lakargi, Russia