Heated in an ignition tube yields water in abundance, otherwise it behaves like pyrolusite.
The substitution of potassium chlorate for pyrolusite is recommended when calcium chloride is present in the bittern.
As an ore of manganese it is much less abundant than pyrolusite or psilomelane.
How does pyrolusite effect the decolorizing of glass containing iron?
Its dioxide (pyrolusite) has been known from very early times, and was at first mistaken for a magnetic oxide of iron.
Binoxide of manganese (Molecule, Mn.O2), is found native as pyrolusite or polyanite.