Thermal expansion of nitrates of lead, barium and strontium

  • R. Srinivasan


The expansion coefficients of barium, strontium and lead nitrates have been studied above room temperatures. Lead nitrate decomposes rapidly beyond 200° C. while crystals of barium nitrate crack above 270° C. Strontium nitrate exhibited no such phenomena till 550° C.

These crystals are isomorphous. The expansion coefficients of lead and strontium nitrates are nearly equal; they also possess the same ionic radii. Barium nitrate has a considerably smaller expansion coefficient though its ionic radius is larger than for the other two. This peculiar behaviour of barium nitrate indicates a stronger binding in this crystal—a fact which is supported by measurements on the elastic constants, Raman effect, solubilities of these salts and a study of the magneto-optic anomaly of aqueous solutions of these salts.


Barium Strontium Elastic Constant Expansion Coefficient Lead Nitrate 
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Copyright information

© Indian Academy of Sciences 1955

Authors and Affiliations

  • R. Srinivasan
    • 1
  1. 1.Department of PhysicsIndian Institute of ScienceBangalore-3

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