Order-disorder in 1:1 type clay minerals by solid-state 27Al and 29Si magic-angle-spinning NMR spectroscopy.

S. Komarneni, C. A. Fyfe, G. J. Kennedy

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


Study by 27Al and 29Si MAS-NMR showed the existence of short-range order in 1:1 dioctahedral layer-silicates; while XRD showed different degrees of long-range order-disorder. Spectra obtained on kaolinite and metakaolin clearly showed the transformation of some octahedral Al in kaolinite to tetrahedral coordination in metakaolin and also showed short-range Al and Si disorder in the latter. This suggests that structural re-arrangement on thermal treatment can be monitored by this technique. These results further suggest that MAS-NMR can detect short-range order, which is complimentary to the information that XRD provides regarding long-range order.-D.J.M.

Original languageEnglish (US)
Pages (from-to)327-333
Number of pages7
JournalClay Minerals
Issue number3
StatePublished - 1985

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology


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