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Structural phase transitions in the liquid state and the melting enthalpy of the Se-Te system

Y Tsuchiva

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Melting enthalpies of the Se-Te system have been measured. It is shown that the melting enthalpies of Te and Te-rich alloys are influenced by the structural changes in the liquid. The melting enthalpy increases almost linearly with Te concentration up to 60 at.%, and then rises steeply to the value for Te, which is consistent with the phase diagram of the liquid. The results are used to evaluate the transition enthalpy Delta H for transitions from L- to H-phase liquids. Delta H is typically about 4 kJ mol-1. The results are discussed with reference to the excess specific heats associated with the structural transitions in the liquid.


PACS

65.20.-w Thermal properties of liquids

64.70.D- Solid–liquid transitions

Subjects

Soft matter, liquids and polymers

Condensed matter: structural, mechanical & thermal

Dates

Issue 9 (30 March 1987)



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