IMA mineral species

Gearksutite

CaAlF₄(OH)·H₂O

Soro-aluminofluoride mineral.

Gearksutite specimen — Tn MW misc 002.jpg · Wikimedia Commons (see file page for author & license)

Properties

🔷 Triclinic✏️ streak white

Chemical formula	CaAlF₄(OH)·H₂O
Elements	Ca, Al, F, O, H
Crystal system	Triclinic
Mohs hardness	—
Density	—
Streak	white
Color	—
IMA symbol	Gak
Nickel–Strunz class	3.CC.05

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

🌍 Where it's found

Type locality (where it was first described): Ivigtuut cryolite deposit, Greenland

Type locality
Notable source / deposit
Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.

Learn more

Gearksutite on Mindat.org
Wikidata item Q3759151 (source of this page's data – you can correct it there)