The role of Sb5+ in the structure of Sb2O 3-B2O3 binary glasses - An NMR and Mössbauer spectroscopy study

Holland, D. and Hannon, A.C. and Smith, M.E. and Johnson, C.E. and Thomas, M.F. and Beesley, A.M. (2004) The role of Sb5+ in the structure of Sb2O 3-B2O3 binary glasses - An NMR and Mössbauer spectroscopy study. Solid State Nuclear Magnetic Resonance, 26 (3-4 SP). pp. 172-179. ISSN 0926-2040

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Abstract

Glasses of general formula xSb2O3 (1-x)B 2O3 (0≤x≤0.8) have been prepared by conventional melt- quenching. Mössbauer spectroscopy shows that a fraction of the Sb3+ is converted to Sb5+ and this fraction increases with x. High-field 11B MAS NMR gives well-resolved resonances from boron atoms which are 3- and 4-coordinated to oxygen. The fraction of 4-coordinated boron, N4, goes through a maximum value of 0.12±0.01 at x=0.5. The position of the maximum in N4 is consistent with the cation potential for Sb3+, as observed for other systems. However, the low value of N4 at this maximum is not so readily explained. The values are similar to those predicted if [BO 4]- were stabilised by [SbO4]+ but the trends with composition are different. © 2004 Elsevier Inc. All rights reserved.

Item Type: Journal Article
Journal or Publication Title: Solid State Nuclear Magnetic Resonance
Subjects:
Departments: VC's Office
ID Code: 130324
Deposited By: ep_importer_pure
Deposited On: 04 Jan 2019 11:45
Refereed?: Yes
Published?: Published
Last Modified: 10 Jun 2019 17:31
URI: https://eprints.lancs.ac.uk/id/eprint/130324

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