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The role of Sb5+ in the structure of Sb2O3-B2O3 binary glasses - an NMR and Mossbauer spectroscopy study
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UNSPECIFIED (2004) The role of Sb5+ in the structure of Sb2O3-B2O3 binary glasses - an NMR and Mossbauer spectroscopy study. SOLID STATE NUCLEAR MAGNETIC RESONANCE, 26 (3-4). pp. 172-179. doi:10.1016/j.ssnmr.2004.02.004 ISSN 0926-2040.
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Official URL: http://dx.doi.org/10.1016/j.ssnmr.2004.02.004
Abstract
Glasses of general formula xSb(2)O(3) (1-x)B2O3 (0 less than or equal to x less than or equal to 0.8) have been prepared by conventional melt- quenching. Mossbauer spectroscopy shows that a fraction of the Sb3+ is converted to Sb5+ and this fraction increases with x. High-field B-11 MAS NMR gives well-resolved resonances from boron atoms which are 3- and 4-coordinated to oxygen. The fraction of 4-coordinated boron, N-4, goes through a maximum value of 0.12 +/- 0.01 at x = 0.5. The position of the maximum in N-4 is consistent with the cation potential for Sb3+, as observed for other systems. However, the low value of N-4 at this maximum is not so readily explained. The values are similar to those predicted if [BO4](-) were stabilised by [SbO4](+) but the trends with composition are different. (C) 2004 Elsevier Inc. All rights reserved.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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Journal or Publication Title: | SOLID STATE NUCLEAR MAGNETIC RESONANCE | ||||
Publisher: | ACADEMIC PRESS INC ELSEVIER SCIENCE | ||||
ISSN: | 0926-2040 | ||||
Official Date: | November 2004 | ||||
Dates: |
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Volume: | 26 | ||||
Number: | 3-4 | ||||
Number of Pages: | 8 | ||||
Page Range: | pp. 172-179 | ||||
DOI: | 10.1016/j.ssnmr.2004.02.004 | ||||
Publication Status: | Published |
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