Neptunium(V) fluoride


Neptunium fluoride or neptunium pentafluoride is a chemical compound of neptunium and fluorine with the formula NpF5.

Synthesis

Neptunium fluoride can be prepared by reacting neptunium(VI) fluoride with iodine:
From the equation above, iodine pentafluoride is a byproduct.

Properties

Neptunium fluoride thermally decomposes at 318 °C to produce neptunium(IV) fluoride and neptunium(VI) fluoride. Contrary to uranium(V) fluoride, neptunium fluoride does not react with boron trichloride, but it reacts with lithium fluoride in anhydrous HF to produce LiNpF6.