title: Potassium magnesium sulfate
text: # Potassium magnesium sulfate
  
  Potassium magnesium sulfate is a double salt that can crystallise in a number of forms that occur as minerals.
  
  * Langbeinite $K_2Mg_2(SO_4)_3$
  * Leonite $K_2Mg(SO_4)_2·4H_2O$
  * Picromerite $K_2Mg(SO_4)_2·6H_2O$
  