Accession Number:

AD0642147

Title:

ON THE THERMODYNAMIC PROPERTIES OF SEVERAL SOLID PHASES OF THE COMPOUND INSB.

Descriptive Note:

Technical rept.,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF METALLURGY

Personal Author(s):

Report Date:

1966-10-24

Pagination or Media Count:

24.0

Abstract:

Measurements of the heat effects on addition of various solid phases of InSb to a solution calorimeter confirmed the existence of a new high-pressure phase InSbIII, which was formed at 37 kbar and 623K. The heats of formation of InSbI, InSbII and InSbIII were measured and the heats of transformation of InSbI to InSbII and InSbIII and of InSbII to InSbIII at atmospheric pressure and 78K were determined independently. Other thermodynamic properties of these phases, the phase boundary InSbIInSbII and the relative positions of the triple points were calculated. The pressure-volume term is shown to be more critical than the internal energy difference in making the phase InSbI less stable than InSbII at high pressures. Observations on partially transformed specimens suggest that the transformation of metastable InSbIII takes place in the two steps InSbIII to InSbII and InSbII to InSbI. Author

Subject Categories:

  • Solid State Physics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE