ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The crystal line phases Me2O·V2O5·2TeO2 (Me=Li, Na, K, Cs, Ag) and their glasses are studied with the aid of infra-red spectroscopy. The radial distribution function (RDF) curves of two glasses, Na2O·V2O5·2TeO2 and Cs2O·V2O5·2TeO2, are obtained by an X-ray diffraction study. An attempt is made to identify the main bands in the infra-red spectra of the crystalline compounds and the glasses. The absorption bands in the 970 to 880 cm−1 range are assigned to the stretching modes of the VO2 isolated groups. A trend is observed towards a shift of the high-frequency band by the replacement of an alkaline ion with another in the order Ag+, Cu+, Li+, Na+, K+, Rb+, Cs+, which is explained by their different polarizing ability. With the aid of X-ray diffraction studies it is shown that the basic structure units in the glasses studied are the VO4 and TeO4 groups.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00772736
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