A METHOD TO ESTIMATE ENTROPIES AND HEAT-CAPACITIES APPLIED TO ALKALI OXIDES

Authors
PENG S GRIMVALL G
Citation
S. Peng et G. Grimvall, A METHOD TO ESTIMATE ENTROPIES AND HEAT-CAPACITIES APPLIED TO ALKALI OXIDES, International journal of thermophysics, 15(5), 1994, pp. 973-981
Citations number
18
Categorie Soggetti
Physics, Applied","Chemistry Physical
Journal title
International journal of thermophysics → ACNP
ISSN journal
0195928X
Volume
15
Issue
5
Year of publication
1994
Pages
973 - 981
Database
ISI
SICI code
0195-928X(1994)15:5<973:AMTEEA>2.0.ZU;2-#
Abstract
We present a method that is useful in the estimate and assessment of h eat capacity data. The approach is based on an analysis of the logarit hmic average of the phonon frequencies. In this quantity, that may be easily derived from experimental data on the vibrational entropy, the influence of atomic masses can be exactly accounted for even in polyat omic solids. Our method is applied to Li2O, Na2O, K2O, Rb2O, and Cs2O. In particular, literature data for K2O are critically examined.