Minerals
Castellaroite
castellaroite
Mn²⁺3(AsO4)2*4H2O
Castellaroite: Mineral information, data and localities. — via www.mindat.org · Source
Overview
Castellaroite is a rare arsenate mineral with formula Mn3(AsO4)2•4H2O. It is related to the phosphate mineral metaswitzerite. Castellaroite is monoclinic, with space group P21/n. The other natural manganese arsenate hydrate is manganohörnesite, which is an octahydrate.