3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||187.89839 g·mol−1|
|Appearance||colorless hygroscopic solid|
|Melting point||72 to 73 °C (162 to 163 °F; 345 to 346 K)|
|Boiling point||236 °C (457 °F; 509 K)|
|Solubility||slightly soluble in chloroform, carbon disulfide, sulfuric acid|
|GHS signal word||Warning|
|H302, H312, H314, H318, H332|
|P260, P261, P264, P270, P271, P280, P301+312, P301+330+331, P302+352, P303+361+353, P304+312, P304+340, P305+351+338, P310, P312, P321, P322, P330, P363, P405, P501|
Related niobium fluorides
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Niobium(V) fluoride, also known as niobium pentafluoride, is the inorganic compound]] with the formula NbF5. The solid consists of tetramers [NbF5]4. It is a colorless solid that is rarely used.
Niobium pentafluoride is obtained by treatment of any niobium compound with fluorine:
In hydrofluoric acid, NbF5 converts to [[NbF7]2- and [[NbF5O]2-. The relative solubility of these potassium salts and related tantalum fluorides are the basis of the Marignac process for separation of Nb and Ta.
NbCl5 forms a dimeric structure (edge-shared bioctahedron) in contrast to the corner-shared tetrameric structure of the fluoride.