Abstract
The application of solid state NMR spectroscopy in minerals is reviewed, specifically in relation to the study of phase transitions. After an introduction to the background theory and terminology, displacive transitions in perovskites and anorthite and the orientational order-disorder transition in sodium nitrite are used to illustrate some studies of the temperature dependence of magnetic resonance phenomena. 29Si magic-angle spinning NMR (MAS NMR) is discussed in terms of the correlation between chemical shift and Si site environment, particularly during Al, Si order-disorder, with examples from a number of aluminosilicates. A study of Al, Si ordering in cordierite, in which 29Si spectra are particularly informative is briefly reviewed.
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