Andreas Sigismund Marggraf


  He was a German chemist who recognized alumina in clay and that magnesia was distinct from calcium compounds. He distinguished between potash and soda and dramatically demonstrated the difference between the two saltpeters — cubic saltpeter (NaNO3) gave a yellow flash in gunpowder and prismatic saltpeter (KNO3) gave a blue flash.



  1. "Aluminum" article in the Hexagon of Alpha Chi Sigma

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