ISSN:
0749-1581
Keywords:
Binary sodium silicate glasses
;
29Si MAS NMR structure models
;
Fictitious temperature concept
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Silicon-29 MAS (9 kHz) NMR spectra at 11.7 T, combined with an improved deconvolution procedure, are used to refine the Qn/Qn-1 distribution model for binary glasses x Na2O · SiO2 (0.18 〈 x 〈 0.49). Using the fictitious temperature concept the binary distribution is shown to be the low-temperature limiting case for the distribution of structural units Qn, Observed deviations from the strict model tending to random distribution can be explained by the model of Dorfeld. Additional structural information can be derived from 29Si chemical shift and line-width data.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260281316
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