Inorganic nomenclature in the context of "Manganate"

In inorganic nomenclature, a manganate is any negatively charged molecular entity with manganese as the central atom. However, the name is usually used to refer to the tetraoxidomanganate(2−) anion, MnO
₄, also known as manganate(VI) because it contains manganese in the +6 oxidation state. Manganates are the only known manganese(VI) compounds.

Other manganates include hypomanganate or manganate(V), MnO
₄, permanganate or manganate(VII), MnO
₄, and the dimanganate or dimanganate(III) Mn
₂O
₆.