Structural characterization of iron–alumino–silicate glasses

Two series of aluminosilicate glasses containing Fe2O3 were investigated. In the first one, the Fe2O3 content was 1.5mol%, and (Al2O3+Na2O) was substituted for SiO2. Na2O was added with Al2O3 in order to keep constant the network polymerization. In the second series, the Fe2O3 content was 4.4mol%, a...

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Published inJournal of non-crystalline solids Vol. 345-346; no. Complete; pp. 66 - 69
Main Authors Antoni, Emilie, Montagne, Lionel, Daviero, Sylvie, Palavit, Gérard, Bernard, Jean-Luc, Wattiaux, Alain, Vezin, Hervé
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.10.2004
Elsevier
Subjects
Chemical Sciences
Material chemistry
A165
G205
X100
E230
61.43.F
M353
Aluminosilicates
Glasses
X ray absorption near-edge spectroscopy
Mössbauer spectroscopy
Chemical structure
Characterziation
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Summary:Two series of aluminosilicate glasses containing Fe2O3 were investigated. In the first one, the Fe2O3 content was 1.5mol%, and (Al2O3+Na2O) was substituted for SiO2. Na2O was added with Al2O3 in order to keep constant the network polymerization. In the second series, the Fe2O3 content was 4.4mol%, and CaO was substituted for Na2O in order to observe the effect of the cations for the charge compensation of tetrahedra. X-ray absorption near-edge spectroscopy at Fe K-edge, Mössbauer spectroscopy and electron spin resonance indicated that both Fe3+ tetrahedral and octahedral coordinations are present in all the glasses. The quantity of octahedral Fe3+ decreases with increased quantity of (Al2O3+Na2O), and with the substitution of CaO for Na2O. This is explained by the influence of the glass basicity on Fe3+ coordination.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2004.07.045