Calculations of the Thermodynamic Properties of Glasses
and Melts in the Cs₂O-B₂O₃-SiO₂ System in the Framework
of the Generalized Lattice Theory of Associated Solutions

E. N. Plotnikov and V. L. Stolyarova

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
ul. Odoevskogo 24/2, St. Petersburg, 199155 Russia

Received January 12, 2005

Abstract—The possibility of calculating the thermodynamic properties of glasses and melts in the Cs₂O–
B₂O₃–SiO₂ system formed by two glass-former oxides and one modifier oxide with the use of the vacancy vari-
ant of the generalized lattice theory of associated solutions is demonstrated. A comparison with the experimen-
tal thermodynamic functions determined earlier by high-temperature differential mass spectrometry and elec-
tromotive force method shows that the calculations performed within this approach lead to reliable thermody-
namic functions. The thermodynamic properties and structural features (the relative numbers of bonds with due
regard for the second coordination sphere) of glasses and melts in the Cs₂O–B₂O₃–SiO₂ system are analyzed
in terms of the generalized lattice theory of associated solutions.

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