Calculation of the configurational entropy of Al, Si in layer silicates using the cluster variation method |
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| Authors: | V L Vinograd A Putnis |
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| Institution: | (1) Institute of Mineralogy, Münster University, Corrensstr. 24, D-48149 Münster, Germany, DE |
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| Abstract: | Entropies of Al-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 29Si NMR data. The results of low order approximations such as “pair” and “star” have been rejected because of their low accuracy
at high Al/(Al+Si) ratios. Reasonably accurate results have been achieved with the help of the “hexagon” and “star-hexagon”
approximations.
Received: 31 October 1997 / Revised, accepted: 17 April 1998 |
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| Keywords: | cluster variation method layer silicates Al Si entropy |
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