Home / Explore / Minerals / Roumaite Minerals Roumaite roumaite (Nb,Ti)(Ca,Na,☐)3(Ca,REE)4(Si2O7)2(OH)F3 Roumaite — Mineral Guide — MineralFYI — via mineralfyi.com · Source Overview Roumaite is a mineral species (sorosilicate mineral). It crystallises in the monoclinic system. Scientific references Roumaite — Wikidata. https://www.wikidata.org/wiki/Q19861243 Link