Neptunium(IV) fluoride or neptunium tetrafluoride is a inorganic compound with the formula NpF4.

It is a green salt and is isostructural with UF4.

[3] 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:[1] It can also be prepared by treating neptunium dioxide with HF gas:[1] This inorganic compound–related article is a stub.

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