Home / Explore / Minerals / Jahnsite-(Cafemg) Minerals Jahnsite-(Cafemg) jahnsite-(CaFeMg) CaFe²⁺Mg2Fe³⁺2(PO4)4(OH)2·8H2O Jahnsite-(CaFeMg): Mineral information, data and localities. — via www.mindat.org · Source Overview Jahnsite-(Cafemg) is a mineral species (phosphate mineral). It crystallises in the monoclinic system. Scientific references Jahnsite-(Cafemg) — Wikidata. https://www.wikidata.org/wiki/Q19860851 Link