What is another word for groutite?
Pronunciation: [ɡɹˈa͡ʊta͡ɪt] (IPA) 
Groutite is a mineral that occurs as a secondary mineral found in various oxidized deposits containing manganese. Another term for groutite is the mineral form of manganese oxide, although it is typically found associated with other minerals and not as a standalone mineral in vast deposits. Some of the synonyms for groutite include brown oxide of manganese, manganese-brown, and manganese dioxide. It has been found in various parts of the world such as the United States, South Africa, and Russia. Its crystal structure is orthorhombic, and it is typically brown to brown-black in color. Despite its limited use, groutite is still an important mineral to mineralogists and geologists as it provides insights into the formation and evolution of ore deposits.
