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Thermal expansion of nitrates of lead, barium and strontium

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Abstract

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.

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Authors and Affiliations

  1. Department of Physics, Indian Institute of Science, Bangalore-3

    R. Srinivasan

Authors
  1. R. Srinivasan
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Additional information

Communicated by Prof. R. S. Krishnan, F.A.SC.

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Srinivasan, R. Thermal expansion of nitrates of lead, barium and strontium. Proc. Indian Acad. Sci. 41, 49–54 (1955). https://doi.org/10.1007/BF03047172

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  • DOI: https://doi.org/10.1007/BF03047172

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