A neutron diffraction and Rietveld analysis of cooperative Li motion in beta-eucryptite

A. Sartbaeva, S.A.T. Redfern, W.T. Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Li mobility and structural changes in the aluminosilicate beta-eucryptite have been studied by high-resolution powder neutron diffraction as a function of temperature from 573 to 873 K. A Li split-atom model was used to describe the disorder of Li+ cations in the structure. Analysis of the data shows two anomalies around 698 and 758 K. The first anomaly is attributed to an M-point zone boundary transition reported in the literature, which is connected to the appearance of the incommensurate structure. The second anomaly is attributed to a displacive phase transition of the framework and doubling in the a cell parameter.
Original languageEnglish
Pages (from-to)5267-5278
Number of pages12
JournalJournal of Physics-Condensed Matter
Volume16
Issue number29
DOIs
Publication statusPublished - 28 Jul 2004

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