Properties
⛏ Mohs hardness3.5
💅🪙🍶🔪💎
A copper coin scratches it.
⚖ Density2.577 g/cm³
Average
🔷 Monoclinic✏️ streak white
| Chemical formula | Na₃SO₄F |
|---|---|
| Elements | Na, S, O, F |
| Crystal system | Monoclinic |
| Mohs hardness | 3.5 |
| Density | 2.577 g/cm³ |
| Streak | white |
| Color | — |
| IMA symbol | Kog |
| Nickel–Strunz class | 7.BD.15 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
🌍 Where it's found
Type locality (where it was first described): Alluaiv Mountain, Russia
- 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
- Kogarkoite on Mindat.org
- Wikipedia article
- Wikidata item Q336394 (source of this page's data – you can correct it there)
IMA mineral species
3–4
Monoclinic
BluePurplePinkWhite & Clear