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Maximal independence and regularity of Al/Si distributions in disordered phyllosilicates 2:1
Montauban Moreira de Oliveira1, Jean Guillaume Eon2
1Instituto de Ciências Exatas, Matemática Pura, Universidade Federal Rural do Rio de Janeiro, P1-90-4, Seropédica, Rio de Janeiro 23890-000, Brazil.
Abstract:
As an extension of previous works, we analyse regularity in disordered Al/Si distributions in phyllosilicates 2:1. The method is based on an analysis of maximal independent sets in a labelled quotient graph of the net. The results, similar to those obtained through the principle of homogeneous dispersion, are in quantitative agreement with published 29Si MAS NMR intensity data for muscovite, phlogopite and vermiculite. The method also allows an easy construction of structural models considering disorder and non-stoichiometry.
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