Manganese Oxide

Manganese oxide is any of a variety of manganese oxides and hydroxides.^[1] These include

• Manganese(II) oxide, MnO
• Manganese(II,III) oxide, Mn₃O₄
• Manganese(III) oxide, Mn₂O₃
• Manganese dioxide, MnO₂
• Manganese(VI) oxide, MnO₃
• Manganese(VII) oxide, Mn₂O₇

Other manganese oxides include Mn₅O₈, Mn₇O₁₂ and Mn₇O₁₃.

It may refer more specifically to the following manganese minerals:

• Birnessite, (Na,Ca)
  0.5(MnIV
  ,MnIII
  )
  2O
  4 · 1.5 H
  2O
• Buserite, MnO
  2 · nH
  2O
• Hausmannite, MnII
  MnIII
  
  2O
  4
• Manganite, Mn^IIIO(OH)
• Manganosite, Mn^IIO
• Psilomelane, Ba(MnII
  )(MnIV
  )
  8O
  16(OH)
  4, or (Ba,H
  2O)
  2Mn
  5O
  10
• Pyrolusite, MnIV
  O
  2

Manganese may also form mixed oxides with other metals :

• Bixbyite, (FeIII
  ,MnIII
  )
  2O
  3, a manganese(III) iron(III) oxide mineral
• Jacobsite, MnII
  FeIII
  
  2O
  4, a manganese(II) iron(III) oxide mineral
• Columbite, (FeII
  ,MnII
  )Nb
  2O
  6, a niobate of iron(II) and manganese(II)
• Tantalite, (FeII
  ,MnII
  )Ta
  2O
  6, a tantalum(V) mineral group close to that of columbite
• Coltan, a mixture of columbite and tantalite series
• Galaxite, MnII
  Al
  2O
  4, a spinel mineral
• Todorokite, (Na,Ca,K,Ba,Sr)_1-x(Mn,Mg,Al)₆O₁₂·3-4H₂O, a rare complex hydrous manganese oxide mineral

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