Raman spectroscopy of glasses in the As-Te system

Journal Article · Fri Jun 15 04:00:00 EDT 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/J.JSSC.2012.02.044· OSTI ID:22012158

Tverjanovich, A ^[1]; Rodionov, K ^[1]; Bychkov, E ^[2]

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1. Department of Chemistry, Saint-Petersburg State University, 198504 St. Petersburg (Russian Federation)
2. Universite du Littoral Cote d'Opale, 59140 Dunkerque (France)

For the first time, the Raman spectra of As{sub x}Te{sub 1-x} glasses, 0.2{<=}x{<=}0.6, have been measured over the entire glass-forming range. The spectra exhibit three broad spectral features attributed to vibrations of structural units having Te-Te, As-Te and As-As bonds. The observed chemical disorder in the glasses is discussed on the basis of partial bond fractions derived from the integrated intensity of the Raman modes. The underlying structural model suggests a dissociation of AsTe- or As{sub 2}Te{sub 3}-related units in the glass melt. The spectra of glasses quenched from different temperatures, as well as those of the annealed vitreous alloys, are consistent with predictions of the model. - Graphical abstract: Raman spectra of the As{sub x}Te{sub 1-x} glasses (0.2{<=}x{<=}0.4 and 0.4{<=}x{<=}0.6). Fractional concentrations of Te-Te, As-Te and As-As bonds in the As{sub x}Te{sub 1-x} glasses calculated using experimental Raman data. The solid lines represent predictions of the dissociation model assuming that the main chemically ordered structural units are related to AsTe. Highlights: Black-Right-Pointing-Pointer For the first time, the Raman spectra of As{sub x}Te{sub 1-x} glasses, 0.2{<=}x{<=}0.6, were measured. Black-Right-Pointing-Pointer The partial bond fractions were derived from the integrated intensity of the Raman modes. Black-Right-Pointing-Pointer An empirical quantitative approach to the Raman data was proposed for the reaction modeling.

• OSTI ID: 22012158
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. . 190; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALLOYS
ARSENIC TELLURIDES
CERAMIC MELTERS
DISSOCIATION
FORECASTING
GLASS
RAMAN SPECTRA
RAMAN SPECTROSCOPY
SIMULATION
SOLIDS
STRUCTURAL MODELS