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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - The role of Sb5+ in the structure of Sb2O 3-B2O3 binary glasses - An NMR and Mössbauer spectroscopy study
AU - Holland, D.
AU - Hannon, A.C.
AU - Smith, M.E.
AU - Johnson, C.E.
AU - Thomas, M.F.
AU - Beesley, A.M.
PY - 2004/11
Y1 - 2004/11
N2 - 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.
AB - 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.
KW - Antimony
KW - Borate
KW - Glass
KW - MAS NMR
KW - Mössbauer spectroscopy
KW - Boron
KW - Melting
KW - Molecular structure
KW - Molecular vibrations
KW - Nuclear magnetic resonance spectroscopy
KW - Positive ions
KW - Quenching
KW - Binary glasses
KW - Melt-quenching
U2 - 10.1016/j.ssnmr.2004.02.004
DO - 10.1016/j.ssnmr.2004.02.004
M3 - Journal article
VL - 26
SP - 172
EP - 179
JO - Solid State Nuclear Magnetic Resonance
JF - Solid State Nuclear Magnetic Resonance
SN - 0926-2040
IS - 3-4 SPEC. ISS.
ER -