Both anatase and brookite belong to the oxide minerals of titanium, which are two homogenous and polymorphic variants of rutile minerals. Anatase is a very rare mineral. Its composition often contains impurities such as ferric oxide and tantalum, niobio, estaño, and manganese. Pertenece al sistema cristalino tetragonal.. Transparent to opaque, hardness is 5.5-6.0. […]
