A possible role of the surface free enthalpy excess of solid chemical elements in their melting and critical temperature

Sandor Kristyan, John A. Olson

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A 5-20% increase in the average number of neighbors of an atom (navrg) in the surface phase between 0 K and melting temperature Tm makes the solid surface "geometrically impossible" to exist at some temperature called the melting temperature. The latter results in the collapse of crystal structure, beginning with the formation of surface layers of liquid a few atoms thick, in agreement with recently published studies. The critical temperature of solid chemical elements is also discussed. The derivation yields expressions for the heat of melting (ΔHm), entropy of melting (ΔSm), melting temperature (Tm) and critical temperature (Tc) in case of pure metals.

Original languageEnglish
JournalSurface Science
Volume255
Issue number3
DOIs
Publication statusPublished - Sep 2 1991

Fingerprint

chemical elements
Chemical elements
Enthalpy
critical temperature
Melting
enthalpy
melting
Melting point
Atoms
Temperature
temperature
Entropy
solid surfaces
Crystal structure
Metals
atoms
surface layers
derivation
entropy
Liquids

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

A possible role of the surface free enthalpy excess of solid chemical elements in their melting and critical temperature. / Kristyan, Sandor; Olson, John A.

In: Surface Science, Vol. 255, No. 3, 02.09.1991.

Research output: Contribution to journalArticle

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