Short range order characterization of the Na2S + SiS2 glass system using Raman, infrared and 29Si magic angle spinning nuclear magnetic resonance spectroscopies

2017 ◽  
Vol 471 ◽  
pp. 39-50 ◽  
Author(s):  
Deborah E. Watson ◽  
Steve W. Martin
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Short Range ◽  
Short Range Order ◽  
Magic Angle Spinning ◽  
Range Order ◽  
Glass System ◽  
Magic Angle ◽  
Angle Spinning

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

Clay Minerals ◽  
1985 ◽  
Vol 20 (3) ◽  
pp. 327-334 ◽  
Author(s):  
S. Komarneni ◽  
C. A. Fyfe ◽  
G. J. Kennedy
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Long Range ◽  
Short Range ◽  
Short Range Order ◽  
Magic Angle Spinning ◽  
Range Order ◽  
Magic Angle ◽  
Long Range Order ◽  
Tetrahedral Coordination ◽  
Angle Spinning

AbstractThe applicability of 27Al and 29Si magic-angle-spinning nuclear magnetic resonance (MASNMR) spectroscopy to the investigation of order-disorder in 1 : 1 dioctahedral layer-silicates was tested. 27Al and 29Si MASNMR showed the existence of short-range order in all these systems 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 MASNMR can detect short-range order, which is complimentary to the information that XRD provides regarding long-range order.

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