Home / Explore / Minerals / Hopmannite Minerals Hopmannite hopmannite Ba2(Ti5Fe)O13 Hopmannite: Mineral information, data and localities. — via zh.mindat.org · Source Overview Hopmannite is a mineral species. It crystallises in the monoclinic system. Nickel–Strunz class: 4.CC.25. Scientific references Hopmannite — Wikidata. https://www.wikidata.org/wiki/Q136487857 Link