Chemical elements
  Rubidium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Rubidium hydride
      Rubidium fluoride
      Rubidium chloride
      Rubidium bromide
      Rubidium iodide
      Rubidium chlorate
      Rubidium perchlorate
      Rubidium iodate
      Rubidium periodate
      Rubidium monoxide
      Rubidium peroxides
      Rubidium hydroxide
      Rubidium peroxide hydrate
      Rubidium sulphides
      Rubidium sulphate
      Rubidium hydrogen sulphate
      Rubidium persulphate
      Rubidium thiosulphate
      Rubidium dithionate
      Rubidium trithionate
      Rubidium tetrathionate
      Rubidium selenate
      Rubidium tellurates
      Rubidium nitride
      Rubidium hydrazoate
      Rubidium nitrite
      Rubidium nitrate
      Rubidium phosphide
      Rubidium phosphates
      Rubidium carbide
      Rubidium carbonate
      Rubidium hydrogen carbonate
      Rubidium percarbonate
      Rubidium pentaborate
    PDB 1dge-461d

Rubidium fluoride, RbF






The Rubidium fluoride, RbF, is obtained in anhydrous crystals by concentrating a solution of sodium carbonate neutralized with hydrofluoric acid. Its melting-point is given as 753° C. and 775° C. The boiling-point is 1410° C., and the vapour-pressure in atmospheres is given by the expression

log p = -40000/4.57T+5.243.

It is very soluble in water, its heat of solution being 5.80 Cal. Two hydrates are known, 2RbF,3H2O, which melts at 36° C., and RbF,3H2O. They are very hygroscopic. With hydrogen fluoride the fluoride yields the primary salt RbF,HF. Other acid fluorides, RbF,2HF, and RbF,3HF, have also been prepared.


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