IMA mineral species

Hectorite

H₂LiMgNaO₁₂Si₄²⁻

Smectite, phyllosilicate mineral.

BrownWhite & Clear

Hectorite specimen
Hectorite Hydrous magnesium iron silicate Hector, California.jpg · Wikimedia Commons (see file page for author & license)

Properties

Chemical formulaH₂LiMgNaO₁₂Si₄²⁻
ElementsH, Li, Mg, Na, O, Si
Crystal systemMonoclinic
Mohs hardness—
Density—
Streakwhite
Color—
IMA symbolHtr
Nickel–Strunz class9.EC.45

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

🌍 Where it's found

Type locality (where it was first described): Hector bentonite mine, Hector, United States