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STUDY OF LOW TEMPERATURE SPECIFIC HEAT AND DC ELECTRIC CONDUCTIVITY OF AMMONIUM CHLORIDE IN PURE POWDER FORM AND IN CRYSTALLINE FORM GROWN FROM UREA SOLUTION.

Author(s) : MITRA S. S., GHORAI S. K., DUTTA ROY S. K.

Type of article: Article

Summary

A CONTINUOUS HEATING CRYOSTAT DEVELOPED FOR MEASUREMENT OF SPECIFIC HEATS OVER THE RANGE 4 TO 300 K IS DESCRIBED. THE CALIBRATION DATA UP TO 77 K WITH POWDER AMMONIUM CHLORIDE ARE PRESENTED AND COMPARED WITH THE PREVIOUS MEASUREMENTS. FURTHER MEASUREMENTS CARRIED ON THE POLYCRYSTALLINE AMMONIUM CHLORIDE, CRYSTALLISED FROM 25% UREA SOLUTION WERE COMPARED AROUND THE PHASE TRANSITION TEMPERATURE (242 K). DIRECT CURRENT ELECTRIC CONDUCTIVITY OF SINGLE CRYSTAL GROWN FROM UREA WAS ALSO STUDIED. A LARGE ANOMALOUS FLUCTUATION IN CONDUCTIVITY HAS BEEN OBSERVED AROUND THE SAID TRANSITION TEMPERATURE.

Details

  • Original title: STUDY OF LOW TEMPERATURE SPECIFIC HEAT AND DC ELECTRIC CONDUCTIVITY OF AMMONIUM CHLORIDE IN PURE POWDER FORM AND IN CRYSTALLINE FORM GROWN FROM UREA SOLUTION.
  • Record ID : 1984-1773
  • Languages: English
  • Source: Indian J. Cryog. - vol. 8 - n. 1
  • Publication date: 1983
  • Document available for consultation in the library of the IIR headquarters only.

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