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Pramana

, Volume 27, Issue 3, pp 475–478 | Cite as

Lattice parameter and thermal expansion of CsCl and CsBr by x-ray powder diffraction. II. Thermal expansion of CsBr from room temperature to 78.2 °K

  • V Ganesan
  • K S Girirajan
Solid State Physics

Abstract

The lattice parameters of CsBr at eight different temperatures from room temperature to 78.2 °K were measured and the true lattice parameters were obtained by the least squares method using the Nelson-Riley extrapolation function. Using these parameters the thermal expansion coefficients of CsBr were estimated at each temperature by fitting them into a cubic polynomial involving temperatureT. Theα T thus obtained were compared with the values of earlier workers who used an interferometric technique and the agreement was found to be good.

Keywords

Nelson-Riley extrapolation thermal expansion caesium bromide powder diffraction lattice parameter cryostat 

PACS No

65.70 

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References

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Copyright information

© Indian Academy of Sciences 1986

Authors and Affiliations

  • V Ganesan
    • 1
  • K S Girirajan
    • 1
  1. 1.Department of Crystallography and BiophysicsUniversity of MadrasGuindy, MadrasIndia

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