Home / Explore / Minerals / Ottohahnite Minerals Ottohahnite ottohahnite Na6(UO2)2(SO4)5(H2O)7·1.5H2O Ottohahnite: Mineral information, data and localities. — via www.mindat.org · Source Overview Ottohahnite is a mineral species (uranyl sulfate mineral). It crystallises in the triclinic system. Scientific references Ottohahnite — Wikidata. https://www.wikidata.org/wiki/Q23894755 Link