IMA mineral species
Hydrokenoralstonite
Na₀.₅(Al,Mg)₂(F,OH)₆·H₂O
Aluminofluoride mineral.
Properties
⛏ Mohs hardness4.5
💅🪙🍶🔪💎
A steel knife scratches it, it won't scratch glass.
| Chemical formula | Na₀.₅(Al,Mg)₂(F,OH)₆·H₂O |
|---|---|
| Elements | Na, Al, Mg, F, O, H |
| Crystal system | Cubic |
| Mohs hardness | 4.5 |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Hkra |
| Nickel–Strunz class | 3.CF.05 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
Care & Handling
- 🪶 Soft, Scratches Easily Mohs 4.5: 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
- Hydrokenoralstonite on Mindat.org
- Wikidata item Q3929821 (source of this page's data – you can correct it there)
IMA mineral species
4–5
Cubic
Soft, Scratches Easily