Sesquioxide

Sesquioxide are chemical compounds, more oxides, a ratio of the metal or semi-metal to oxygen of 1:. 1.5, ( sesqui = " half fold " )

Therefore have sesquioxides with a stoichiometrically exact composition of the empirical formula A2O3, where A is the oxidation number of III owns. Sesquioxides mostly form crystalline solids.

Examples of Metallsesquioxide:

  • Iron (III ) oxide Fe2O3: iron sesquioxide, in nature as the mineral hematite
  • Aluminum oxide Al2O3: aluminum sesquioxide, in nature as the mineral corundum
  • The oxides of the trivalent rare-earth metals

In naturally developed soils are especially iron (III ) oxide, manganese ( III ) oxide and aluminum oxide is important. The term therefore is sesquioxides in soil science for these three compounds.

Examples of Halbmetallsesquioxide:

  • Boric oxide B2O3 ( Borsesquioxid )
  • Arsenic (III ) oxide, As2O3 ( Arsensesquioxid )

Sesquioxides in the main group 1:

  • Rb4O6 → [ (Rb ) 4 ( O22 - ) ( O2 ) 2]
Rare earth element Pedology (soil study)
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