IMA mineral species
Roumaite
(Nb,Ti)(Ca,Na,☐)₃(Ca,REE)₄(Si₂O₇)₂(OH)F₃
Sorosilicate mineral.
Properties
| Chemical formula | (Nb,Ti)(Ca,Na,☐)₃(Ca,REE)₄(Si₂O₇)₂(OH)F₃ |
|---|---|
| Elements | Nb, Ti, Ca, Na, Si, O, H, F |
| Crystal system | Monoclinic |
| Mohs hardness | — |
| Density | — |
| Streak | — |
| Color | — |
| IMA symbol | Rma |
“—” means no reliable value in Wikidata yet. Check Mindat for full data.
🌍 Where it's found
Type locality (where it was first described): Rouma Island, Guinea
- 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
- Roumaite on Mindat.org
- Wikidata item Q19861243 (source of this page's data – you can correct it there)
IMA mineral species
Monoclinic