title: Dysprosium(III) nitrate
text: # Dysprosium(III) nitrate
  
  Dysprosium(III) nitrate is an inorganic compound, a salt of dysprosium and nitric acid with the chemical formula $Dy(NO_3)_3.$ The compound forms yellowish crystals, dissolves in water, forms a crystalline hydrate.
  
  ## Synthesis
  
  Anhydrous salt is obtained by the action of nitrogen dioxide on dysprosium(III) oxide:
  
         ${\mathsf {2Dy_{2}O_{3}+9N_{2}O_{4}\ {\xrightarrow {150^{o}C}}\ 4Dy(NO_{3})_{3}+6NO}}$
  
  The action of nitrogen dioxide on metallic dysprosium:
  
         ${\mathsf {Dy+3N_{2}O_{4}\ {\xrightarrow {200^{o}C}}\ Dy(NO_{3})_{3}+3NO}}$
  
  ## Physical properties
  
  Dysprosium(III) nitrate forms yellowish crystals.
  
  Forms a crystalline hydrate of the composition ${\ce {Dy(NO3)3*5H2O}}$, which melts in its own crystallization water at 88.6 °C.
  
  Soluble in water and ethanol, hygroscopic.
  
  ## Chemical properties
  
  Hydrated dysprosium nitrate thermally decomposes to form ${\ce {DyONO3}}$, and further heating produces dysprosium oxide.
  
  ## Application
  
  Dysprosium(III) nitrate is used as a catalyst.
  
  