Description of Thermodynamic Functions of Aluminosilicates with the Zeolite-Like Composition by Sums of Einstein–Planck FunctionsстатьяИсследовательская статья
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Аннотация:Weighted sums of Einstein–Planck functions were used to describe thermodynamic functions of nine aluminosilicates with the zeolite-like stoichiometric composition: anorthite, armenite (hydrated and dehydrated forms), jadeite, carnegieite, cordierite (hydrated and dehydrated forms), osumilite, and petalite. The error of such description is comparable to the experimental error, and the number of individual Einstein–Planck functions in a sum ranges from 4 to 6. The existing additive model of thermodynamic properties of zeolites based on the Einstein–Planck functions fits the experimental data on all the considered aluminosilicates, except jadeite, osumilite and cordierite, over a wide temperature range (from 0 to 1800 K). For cordierite and osumilite, the discrepancies are due to high magnesium contents in them; and for jadeite, to its structural difference from the other considered aluminosilicates.