Calculation of the configurational entropy of Al, Si in layer silicates using the cluster variation method

Authors
Vinograd, VL Putnis, A
Citation
Vl. Vinograd et A. Putnis, Calculation of the configurational entropy of Al, Si in layer silicates using the cluster variation method, PHYS CHEM M, 26(2), 1998, pp. 135-148
Citations number
34
Categorie Soggetti
Earth Sciences
Journal title
PHYSICS AND CHEMISTRY OF MINERALS
ISSN journal
03421791 → ACNP
Volume
26
Issue
2
Year of publication
1998
Pages
135 - 148
Database
ISI
SICI code
0342-1791(199812)26:2<135:COTCEO>2.0.ZU;2-9
Abstract
Entropies of A-Si in layer silicates have been calculated using a series of CVM approximations for the honeycomb lattice. The parameters of the models have been constrained by Si-29 NMR data. The results of low order approxim ations such as "pair" and "star" have been rejected because of their low ac curacy at high Al/(Al+Si) ratios. Reasonably accurate results have been ach ieved with the help of the "hexagon" and "star-hexagon" approximations.