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The atomic structure of niobium and tantalum containing borophosphate glasses

Wetherall, K.M., Doughty, P., Mountjoy, Gavin, Bettinelli, M., Speghini, A., Casula, M.F., Cesare-Marincola, F., Locci, E., Newport, Robert J. (2009) The atomic structure of niobium and tantalum containing borophosphate glasses. Journal of Physics Condensed Matter, 21 (37). p. 375106. ISSN 0953-8984. (doi:10.1088/0953-8984/21/37/375106) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
https://doi.org/10.1088/0953-8984/21/37/375106

Abstract

A complete structural study has been carried out on sodium borophosphate glass containing increasing amounts of either niobium or tantalum. A combination of high energy x-ray diffraction, neutron diffraction, extended x-ray absorption fine structure, nuclear magnetic resonance, and infrared and Raman spectroscopy has been used to discern the local atomic structure of each component and the changes with M content, where M is either niobium or tantalum. The glasses are found to consist of tetrahedral borate and phosphate with octahedral MO6. As expected, B and P play the roles of tetrahedral network formers. At low M content there are isolated MO6 units with and linkages that contribute to the glass network. As the M content increases, the number of links increases, and at the highest M content each MO6 unit is connected to several others. The octahedra become significantly distorted as the niobium content increases, an effect that is not seen for tantalum.

Item Type: Article
DOI/Identification number: 10.1088/0953-8984/21/37/375106
Additional information: Unmapped bibliographic data: C7 - 375106 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - J Phys Condens Matter [Field not mapped to EPrints] AD - School of Physical Sciences, University of Kent, Ingram Building, Canterbury CT2 7NH, United Kingdom [Field not mapped to EPrints] AD - Laboratorio di Chimica Dello Stato Solido, DB, Universit di Verona, UdR Verona, Strada Le Grazie 15, 37134 Verona, Italy [Field not mapped to EPrints] AD - DiSTeMeV, Universit di Verona, UdR Verona, Via della Pieve 70, 37029 Verona, Italy [Field not mapped to EPrints] AD - Dipartimento di Scienze Chimiche, Universita di Cagliari, SS 554 Bivio per Sestu, 09042 Monserrato (CA), Italy [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Atomic structure, Extended X-ray absorption fine structures, Glass network, High energy x-ray diffraction, Infrared and Raman spectroscopy, Local atomic structures, Niobium content, Structural studies, Absorption spectroscopy, Atomic spectroscopy, Diffraction, Infrared spectroscopy, Niobium, Nuclear magnetic resonance, Nuclear magnetic resonance spectroscopy, Raman spectroscopy, Sodium, Tantalum, X ray diffraction, Borophosphate glass
Subjects: Q Science > QC Physics > QC176 Solid state physics
Q Science > QC Physics
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 16 Jan 2015 09:46 UTC
Last Modified: 29 May 2019 14:03 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46600 (The current URI for this page, for reference purposes)
Newport, Robert J.: https://orcid.org/0000-0002-2365-992X
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