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Manganese(II) oxide is an inorganic compound with chemical formula MnO.[2] It forms green crystals. The compound is produced on a large scale as a component of fertilizers and food additives.
Other names
Manganous oxide
Manganosite
manganese monoxide
Hypomanganous oxide
Structure, stoichiometry, reactivity
Like many monoxides, MnO adopts the rock salt structure, where cations and anions are both octahedrally coordinated. Also like many oxides, manganese(II) oxide is often nonstoichiometric: its composition can vary from MnO to MnO1.045
Below 118 K MnO is antiferromagnetic MnO has the distinction of being one of the first compounds to have its magnetic structure determined by neutron diffraction, the report appearing in 1951 This study showed that the Mn2+ ions form a face centered cubic magnetic sub-lattice where there are ferromagnetically coupled sheets that are anti-parallel with adjacent sheets.
Manganese(II) oxide undergoes the chemical reactions typical of an ionic oxide. Upon treatment with acids, it converts to the corresponding manganese(II) salt and water. Oxidation of manganese(II) oxide gives manganese(III) oxide.
Applications
Together with manganese sulfate,
MnO is a component of fertilizers and food additives.
Many thousands of tons are consumed annually for this purpose.
Other uses include:
a catalyst in the manufacture of allyl alcohol,
ceramics,
paints,
colored glass
bleaching tallow
textile printing.