Sentence Examples

  • Columbium pentafluoride, CbF5, is obtained when the pentoxide is dissolved in hydrofluoric acid.
  • Tantalum pentafluoride, TaF5, for a long time only known in solution, may be obtained by passing fluorine over an alloy of tantalum and aluminium, and purifying by distillation in a vacuum.
  • Phosphorus pentafluoride, PF5, discovered by Thorpe (Proc. Roy.
  • Electric sparks give at first free sulphur and the trifluoride, the latter at a higher temperature splitting into the pentafluoride and phosphorus.