Home / Explore / Minerals / Alum-(Na) Minerals Alum-(Na) alum-(Na) NaAl(SO4)2·12H2O Alum-(Na): Mineral information, data and localities. — via www.mindat.org · Source Overview Alum-(Na) is a mineral species (sulfate mineral). It crystallises in the cubic system. Nickel–Strunz class: 7.CC.20. Scientific references Alum-(Na) — Wikidata. https://www.wikidata.org/wiki/Q3613396 Link