Structural organization and thermal properties of the Sb2O3-SbPO4 glass system
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2004-12-07
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Royal Soc Chemistry
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The structural organization of Sb2O3-SbPO4 glasses has been studied by FTIR, Raman, P-31 MAS and spin echo NMR, Mossbauer and X-ray absorption spectroscopy (EXAFS and XANES at K and L-3,L-1-Sb edges). The combined results can be explained in terms of two potential mechanisms describing the change of the Sb(m) local environment upon incorporation of Q((4))-type phosphate. The formation of the latter species requires anionic compensation that may be adjusted by (a) formation of non bridging oxygen or (b) formation of SbO4E- groups (E = non-bonding electron pair). The second model is favored.
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Journal of Materials Chemistry. Cambridge: Royal Soc Chemistry, v. 14, n. 23, p. 3398-3405, 2004.
