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 nitrate, RbNO3






The Rubidium nitrate, RbNO3, is trimorphous, crystallizing in hexagonal, cubic, and bi-refractive forms, the transition-points in the order named being 161.4° C. and 218.9° to 219.3° C. The crystals are very hard, melt at 313° C., and have a density of 3.131 at 15° C. and 3.112 at 20° C. The molecular electric conductivity of rubidium nitrate between 318.8° and 493° C. is given by the formula

μt =33.51 + 0.145(t – 300).

The solubility in water is given in the table:

Solubility of Rubidium Nitrate

Temperature, °C.0102030405060708090100
Grams of RbNO3 per 100 g. of water.19.533.053.381.3116.7155.6200251309375452
A saturated solution containing 617 grams in 100 grams of water boils at 118.3° C. under a pressure of 734 mm. of mercury. In chemical properties the salt resembles potassium nitrate. It exhibits radioactivity. With nitric acid it yields acid nitrates, RbNO3,HNO3, melting at 62° C., and RbNO3,2HNO3, melting at 39° to 46° C.


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