What is Manganese Oxide Mn2O3?
Manganese Oxide Mn2O3 is an oxide with a chemical formula of Mn2O3 and a molecular weight of 157.88. It is a black cubic crystal, insoluble in water, acetic acid, and ammonium chloride solution, but soluble in other inorganic acids. Manganese Oxide Mn2O3 dissolves in cold hydrochloric acid to form a brown solution, turns into a red solution in hot dilute sulfuric acid or concentrated sulfuric acid, decomposes into MnO, and manganese nitrate in hot nitric acid, and decomposes into Mn3O4 by heating and releases O. Manganese Oxide Mn2O3 exists in two forms: α-Mn2O3 and γ-Mn2O3. The α-type is obtained by decomposing divalent manganese nitrates, carbonates or chlorides, and hydrides in the air to 600-800C. The γ-type is produced by heating MnO2 at 500C for 78 hours in a vacuum. Manganese Oxide Mn2O3 can be used in the printing and dyeing process of cloth. It can also be used to synthesize soft magnetic materials, or as an important base material for the synthesis of lithium-ion batteries.
Manganese Oxide Mn2O3 Structure
Manganese Oxide Mn2O3 is unlike many other transition metal oxides in that it does not adopt the corundum (Al2O3) structure. Two forms are generally recognized, α-Mn2O3 and γ-Mn2O3, although a high-pressure form with the CaIrO3 structure has been reported too.
α-Mn2O3 has a cubic bixbyite structure, which is an example of a C-type rare earth sesquioxide. The bixbyite structure is stabilized by the presence of small amounts of Fe3+,...
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