Niobium(IV) fluoride

Niobium(IV) fluoride
Names
	IUPAC name Niobium(IV) fluoride
Identifiers
CAS Number	13842-88-1 ;
Properties
Chemical formula	NbF4
Molar mass	168.9 g/mol
Appearance	black solid
Melting point	350°C(decomposes)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Niobium(IV) fluoride is a chemical compound with the formula NbF₄; it is a nonvolatile black solid. It absorbs vapor strongly. It turns into NbO₂F in moist air. NbF₄ reacts with water to form a brown solution and a brown precipitate whose components are unknown. It is stable between 275°C and 325°C when heated in a vacuum. However, it disproportionates at 350°C rapidly to form niobium(V) fluoride and niobium(III) fluoride:

\mathrm {\ 2NbF_{4}\rightarrow NbF_{5}+NbF_{3}}

(at 350°C)^[1]

References

^ 张青莲 (1981). 无机化学丛书. Beijing: Science Press. p. 323. ISBN 7-03-002238-6.

[1] 张青莲 (1981). 无机化学丛书. Beijing: Science Press. p. 323. ISBN 7-03-002238-6.

[1]