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 journalArticle

28 Citations (Scopus)

Abstract

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
Volume20
Issue number3
StatePublished - Jan 1 1985

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Kaolin
Magic angle spinning
MAS
Order disorder transitions
Clay minerals
crystal structure
Nuclear magnetic resonance spectroscopy
kaolinite
nuclear magnetic resonance
clay mineral
spectroscopy
X-ray diffraction
Nuclear magnetic resonance
Silicates
silicate
Heat treatment
solid state
thermal treatment
co-ordination

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology

Cite this

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abstract = "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.",
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Order-disorder in 1:1 type clay minerals by solid-state 27Al and 29Si magic-angle-spinning NMR spectroscopy. / Komarneni, S.; Fyfe, C. A.; Kennedy, G. J.

In: Clay Minerals, Vol. 20, No. 3, 01.01.1985, p. 327-333.

Research output: Contribution to journalArticle

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T1 - Order-disorder in 1:1 type clay minerals by solid-state 27Al and 29Si magic-angle-spinning NMR spectroscopy.

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AB - 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.

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