Properties
| Chemical formula | Mg₂Mn³⁺O₂(BO₃) |
|---|---|
| Elements | Mg, Mn, O, B |
| Crystal system | Orthorhombic |
| Mohs hardness | — |
| Density | — |
| Streak | brown |
| Color | black |
| IMA symbol | Tké |
| Nickel–Strunz class | 6.AB.40 |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
🌍 Where it's found
Type locality (where it was first described): Långban, Sweden
- 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
- Takéuchiite on Mindat.org
- Wikidata item Q3980333 (source of this page's data – you can correct it there)
IMA mineral species
Orthorhombic
Black