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| Titel: |
The internal energy of an equilibrium glass at 0 K |
| Auteur: |
Johari, G. P. Perez, J. |
| Verschenen in: |
Molecular physics |
| Paginering: | Jaargang 83 (1994) nr. 2 pagina's 235-244 |
| Jaar: |
1994-10-10 |
| Inhoud: |
We postulate that, like that of an ordered crystal, the equilibrium structure of a glass is characterized by the magnitude of its internal energy. The excess δE°0 of this energy over that of its ordered crystal has been calculated for six glasses from their heat capacity data and a theory of defects in a glass. Its value of 1·3-6·2 kJ mol-1 represents the decrease in the heat of sublimation at 0 K when the structural order is lost. The absolute internal energy of an equilibrium glass at 0 K is equal to the sum of this δE°0 and the lattice and zero-point vibrational energies of its crystalline form. Implications of these observations for our current understanding of glass thermodynamics are pointed out. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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