Facts
- Country
- Norway
- Minerals
- 3
- Species citing it (Wikidata)
- 2
- First described here
- Gjerdingenite-Fe, Gjerdingenite-Mn, Janhaugite
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q27489823
Minerals first described here · 3
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Gjerdingenite-Fe | K₂Fe(Nb,Ti)₄(Si₄O₁₂)₂(O,OH)₄·6H₂O | — | — | — |
| Gjerdingenite-Mn | K₂Mn(Nb,Ti)₄(Si₄O₁₂)₂(O,OH)₄·6H₂O | — | — | — |
| Janhaugite | (Na,Ca)₃(Mn²⁺,Fe²⁺)₃(Ti,Zr,Nb)₂(Si₂O₇)₂O₂(OH,F)₂ | Monoclinic | — | — |