title: Arsenic tetroxide
text: # Arsenic tetroxide
  
  Arsenic tetroxide is an inorganic compound with the chemical formula $As_2O_4,$ containing As(III) and As(V), $As^{III}As^VO_4.$
  
  ## Synthesis
  
  It can be synthesized in an autoclave via the following reaction:
  
      2 As $_2O$ $_3$ + O $_2$ → 2 As $_2O$ $_4$
  
  ## Structure
  
  It adopts a layer structure, and the coordination geometry of As(III) is triangular pyramid while As(V) is tetrahedral.
  
  