Facts
- Country
- Guinea
- Minerals
- 3
- Species citing it (Wikidata)
- 2
- First described here
- Roumaite, Serandite, Villiaumite
Sources: Wikidata (CC0), IMA list of minerals via Wikidata · Wikidata Q28041192
Minerals first described here · 3
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Roumaite | (Nb,Ti)(Ca,Na,☐)₃(Ca,REE)₄(Si₂O₇)₂(OH)F₃ | Monoclinic | — | — |
| Serandite | NaMn²⁺₂Si₃O₈(OH) | Triclinic | — | — |
| Villiaumite | NaF | Cubic | — | 2.92 g/cm³ |
Minerals · 1
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Roumaite | (Nb,Ti)(Ca,Na,☐)₃(Ca,REE)₄(Si₂O₇)₂(OH)F₃ | Monoclinic | — | — |