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) : Jena,A. K. ; Bever,M. B. ; Banus,M. D.

Report Date : 24 OCT 1966

Pagination or Media Count : 24

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 InSb(III), which was formed at 37 kbar and 623K. The heats of formation of InSb(I), InSb(II) and InSb(III) were measured and the heats of transformation of InSb(I) to InSb(II) and InSb(III) and of InSb(II) to InSb(III) at atmospheric pressure and 78K were determined independently. Other thermodynamic properties of these phases, the phase boundary InSb(I)/InSb(II) 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 InSb(I) less stable than InSb(II) at high pressures. Observations on partially transformed specimens suggest that the transformation of metastable InSb(III) takes place in the two steps InSb(III) to InSb(II) and InSb(II) to InSb(I). (Author)

Descriptors :   (*SEMICONDUCTORS, PHASE STUDIES), (*INDIUM ALLOYS, THERMODYNAMICS), (*ANTIMONY ALLOYS, THERMODYNAMICS), HIGH PRESSURE, SOLID SOLUTIONS, THERMAL PROPERTIES, TRANSFORMATIONS, HEAT OF FORMATION, CALORIMETRY, STABILITY

Subject Categories : Solid State Physics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE