Characterisation of novel sodalites by neutron diffraction and solid-state NMR

M. T. Weller, G. Wong

Research output: Contribution to journalArticle

Abstract

A range of sodalites of general formula LiNa(AlSiO)Cl have been synthesised by structure conversion and ion exchange reactions. High resolution Si NMR spectra of these compounds demonstrate a single resonance, the frequency of which varies smoothly with lithium content and the geometry of the Si-(OAl) tetrahedron determined by powder neutron diffraction. Incorporation of lithium in the sodalite structure results in contraction of the Si-O-Al bond angle to accommodate the preferred coordination geometry of the smaller cavity species. In partially exchanged materials the chloride ion is displaced away from the cavity centre.
Original languageEnglish
Pages (from-to)430-435
JournalSolid State Ionics
Volume32-33
Issue numberPART 1
DOIs
Publication statusPublished - 1989

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