Home / Explore / Minerals / Hedegaardite Minerals Hedegaardite hedegaardite (Ca,Na)9(Ca,Na)Mg(PO4)6(PO3OH) Hedegaardite: Mineral information, data and localities. — via www.mindat.org · Source Overview Hedegaardite is a mineral species (phosphate mineral). It crystallises in the trigonal system. Scientific references Hedegaardite — Wikidata. https://www.wikidata.org/wiki/Q19862350 Link