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The Ge-O-Ge bond angle distribution in GeO2 glass: a NMR determination
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UNSPECIFIED (1999) The Ge-O-Ge bond angle distribution in GeO2 glass: a NMR determination. JOURNAL OF NON-CRYSTALLINE SOLIDS, 246 (3). pp. 159-168. ISSN 0022-3093.
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Abstract
O-17 MAS and static NMR spectra, from amorphous germania and quartz-like GeO2, have been used to estimate the range of O-17 quadrupolar parameters in the glass for different assumed bond angle distributions. The spectra from the quartz-like polymorph of GeO2 were used to provide reference data for oxygen connected to four-fold coordinated germanium. Nuclear quadrupole coupling constants, (C-Q = e(2)qQ/h), asymmetry parameters, (eta), and isotropic chemical shifts, (delta(i)), were obtained from simulations, of glass spectra obtained at different fields, in which a range of quadrupolar parameters were employed, according to various postulated bond angle distributions. Our results show that the Ge-(O) over cap-Ge angle distribution in amorphous germania is consistent with a Gaussian distribution with most probable angle of 130 +/- 1 degrees and sigma close to 4 degrees - smaller than hitherto reported for GeO2. (C) 1999 Elsevier Science B.V. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TP Chemical technology T Technology > TA Engineering (General). Civil engineering (General) |
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Journal or Publication Title: | JOURNAL OF NON-CRYSTALLINE SOLIDS | ||||
Publisher: | ELSEVIER SCIENCE BV | ||||
ISSN: | 0022-3093 | ||||
Official Date: | 1 May 1999 | ||||
Dates: |
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Volume: | 246 | ||||
Number: | 3 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 159-168 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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