Samiksha Jaiswal (Editor)

Niobium(V) fluoride

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Formula
  
NbF5

Density
  
3.29 g/cm³

Pubchem
  
82217

Molar mass
  
187.898 g/mol

Boiling point
  
236 °C

Niobium(V) fluoride httpsuploadwikimediaorgwikipediacommonsthu

Related niobium fluorides
  
Niobium(III) fluoride Niobium(IV) fluoride

Appearance
  
colorless monoclinic crystals; hygroscopic

Niobium(V) fluoride, also known as niobium pentafluoride, is a colorless crystalline solid often used as a starting material in niobium chemistry.

Preparation

Niobium pentafluoride is obtained as an intermediate during the recovery of niobium metal from its ores. It also can be prepared by direct fluorination of niobium metal at 250 to 300 °C, either by fluorine gas or anhydrous hydrofluoric acid. The pentafluoride vapors are condensed in a pyrex or quartz tube from which it is sublimed at 120 °C under vacuum and collected as colorless crystals.

Also, niobium pentafluoride can be prepared by the reaction of fluorine with niobium pentachloride:

2NbCl5 + 5F2 → 2NbF5 + 5Cl2

References

Niobium(V) fluoride Wikipedia
(Text) CC BY-SA