Neptunium(IV) fluoride or neptunium tetrafluoride is a

inorganic compound In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...

with the

formula In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a ''chemical formula''. The informal use of the term ''formula'' in science refers to the general construct of a relationship betwee ...

NpF₄. It is a green salt and is isostructural with UF₄.

Synthesis

left, 162px, Alternative view of the structure of solid NpF₄. Neptunium(IV) fluoride can be prepared by reacting neptunium(III) fluoride or

neptunium dioxide Neptunium(IV) oxide, or neptunium dioxide, is a radioactive, olive green cubic crystalline solid with the formula NpO2. It emits both α- and γ-particles. Production Industrially, neptunium dioxide is formed by precipitation of neptunium(IV) ...

with a gas mixture of

oxygen Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as wel ...

and

hydrogen fluoride Hydrogen fluoride (fluorane) is an inorganic compound with the chemical formula . This colorless gas or liquid is the principal industrial source of fluorine, often as an aqueous solution called hydrofluoric acid. It is an important feedstock i ...

at 500 °C: :

\mathrm

It can also be prepared by treating

with HF gas: :

\mathrm

References

Neptunium compounds Fluorides Actinide halides {{inorganic-compound-stub