Crystopedia
IMA mineral species

Thomsenolite

🪶 Soft, Scratches Easily

NaCaAlF₆·H₂O

Neso-aluminofluoride mineral.

RedPurpleBrownWhite & Clear

Thomsenolite specimen
Thomsenolite and Ralstonite - Ivittuut, Arsuk Firth, Kitaa. West Greenland.jpg · Wikimedia Commons (see file page for author & license)

Properties

⛏ Mohs hardness2
12345678910
💅🪙🍶🔪💎

Scratches with a fingernail.

🔷 Monoclinic✏️ streak white
Chemical formulaNaCaAlF₆·H₂O
ElementsNa, Ca, Al, F, H, O
Crystal systemMonoclinic
Mohs hardness2
Density—
Streakwhite
Color—
IMA symbolTse
Nickel–Strunz class3.CB.40

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

Care & Handling

  • 🪶 Soft, Scratches Easily Mohs 2: softer than a steel knife, so it scratches easily. Store it apart from harder stones.

🌍 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