title: Aluminium oxides
text: # Aluminium oxides
  
  Aluminium oxides or aluminum oxides are a group of inorganic compounds with formulas including aluminium (Al) and oxygen (O).
  
  * Aluminium(I) oxide $(Al_2O)$
  * Aluminium(II) oxide (AlO) (aluminium monoxide)
  * Aluminium(III) oxide (aluminium oxide), $(Al_2O_3),$ the most common form of aluminium oxide, occurring on the surface of aluminium and also in crystalline form as corundum, sapphire, and ruby.
  