Neptunium(III) fluoride

Neptunium(III) fluoride or neptunium trifluoride is a salt of neptunium and fluorine with the formula NpF3.

Synthesis
Neptunium(III) fluoride can be prepared by reacting neptunium dioxide with a gas mixture of hydrogen and hydrogen fluoride at 500 °C:


 * $$\mathrm{2\ NpO_2\ +\ H_2\ +\ 6\ HF\ \longrightarrow \ 2\ NpF_3\ +\ 4\ H_2O}$$