Dunnite
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Dunnite, also known as Explosive D or Ammonium picrate was developed by Major Dunn in 1906 and was used extensively by the US Navy during World War I.
Dunnite is a relatively insensitive explosive, which meant it was useful for armour piercing shells, exploding only after the shell had actually pierced the armour.
It should not be confused with the mineral Dunite.