Home / Explore / Minerals / Postite Minerals Postite postite Mg(H2O)6Al2(OH)2(H2O)8(V10O28)·13H2O Postite mineral information and data — via www.dakotamatrix.com · Source Overview Postite is a mineral species (hydrous decavanate mineral). It crystallises in the orthorhombic system. Scientific references Postite — Wikidata. https://www.wikidata.org/wiki/Q19861203 Link