Properties
| Chemical formula | Mn³⁺O(OH) |
|---|---|
| Elements | Mn, O, H |
| Crystal system | — |
| Mohs hardness | — |
| Density | 4.144 g/cm³ |
| Streak | brown |
| Color | — |
| IMA symbol | Gro |
| Nickel–Strunz class | 4.FD.10 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
🌍 Where it's found
Type locality (where it was first described): Cuyuna Range, United States
- 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
- Groutite on Mindat.org
- Wikipedia article
- Wikidata item Q304018 (source of this page's data – you can correct it there)
IMA mineral species
Black