- The preparation and properties of niobium tetrafluoride and oxyfluorides
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Niobium tetrafluoride has been prepared by the reduction of niobium pentafluoride with Si or Nb powder at 300-350°. X-Ray diffraction studies of the tetrafluoride show that it has a tetragonal unit cell with a0 = 4.081 and c0 = 8.162 A?. Reduction of NbF5 in sealed quartz tubes with red phosphorus, arsenic, or silicon gave rise to a series of very stable niobium oxyfluorides having the same structure as NbF3.
- Gortsema,Didchenko
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- Reactions of Ruthenium Pentafluoride with Refractory Metals
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Differential thermal analysis, X-ray powder diffraction, and IR spectroscopy were the tools used to study reactions of powdered and compact samples of V, Nb, Mo, and W, as well as of Si and Ge, with RuF5. The onset temperatures and products of the reactions were determined. The possibility of using exchange reactions to apply ruthenium coatings to the simple substances that form volatile higher fluorides was shown.
- Rakov,Dzhalavyan,Nikitin
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p. 1003 - 1005
(2008/10/08)
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