Neptunium(IV) fluoride explained

Neptunium(IV) fluoride or neptunium tetrafluoride is a inorganic compound with the formula NpF₄. It is a green salt and is isostructural with UF₄.

Synthesis

thumb|left|162px|Alternative view of the structure of solid NpF₄.Neptunium(IV) fluoride can be prepared by reacting neptunium(III) fluoride or neptunium dioxide with a gas mixture of oxygen and hydrogen fluoride at 500 °C:

4 NpF _{3 + O} _{2 + 4 HF \longrightarrow} 4 NpF _{4 + 2 H} _{2O}

It can also be prepared by treating neptunium dioxide with HF gas:

NpO _{2 + 4 HF \longrightarrow} NpF _{4 + 2 H} _{2O}