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

doi:10.1180/claymin.1985.020.3.05

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 journal › Article › peer-review

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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.

Original language	English (US)
Pages (from-to)	327-333
Number of pages	7
Journal	Clay Minerals
Volume	20
Issue number	3
DOIs	https://doi.org/10.1180/claymin.1985.020.3.05
State	Published - 1985

All Science Journal Classification (ASJC) codes

Geochemistry and Petrology

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10.1180/claymin.1985.020.3.05

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

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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AU - Komarneni, S.

AU - Fyfe, C. A.

AU - Kennedy, G. J.

PY - 1985

Y1 - 1985

N2 - 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.

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

Abstract

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