Please use this identifier to cite or link to this item: doi:10.22028/D291-24191
Title: Pre-resonant Raman effect of CrO2-4 in a metasilicate glass
Author(s): Ziemath, Ervino C.
Aegerter, Michel A.
Melo, F. E. A.
Moreira, J. E. C.
Mendes Filho, J.
Dantas, M. S. S.
Pimenta, M. A.
Language: English
Year of Publication: 1996
OPUS Source: Journal of non-crystalline solids. - 194. 1996, S. 41-47
SWD key words: Raman-Spektroskopie
DDC notations: 500 Science
Publikation type: Journal Article
Abstract: Pre-resonant Raman effect of chromate ion, CrO42-, was observed in a metasilicate glass with molar composition 2Na2O · 1CaO · 3SiO2 containing 1.0 wt% of Cr2O3. Raman spectra were measured by the conventional 90° scattering geometry and by the microprobe Raman spectroscopic techniques. The presence of chromate ions in the glass is favoured by the glass composition and oxidizing conditions during the glass melting, and they are responsible for optical absorption bands at 370 and 250 nm. Raman spectrum of the undoped glass presents bands at 625, 860 and 980 cm-1, and the presence of chromate ions gives rise to additional bands at 365, 850 and a shoulder at 890 cm-1. An enhancement of the 850 cm-1 Raman band is observed with decreasing laser exciting wavelength. The exciting frequency dependence of the intensity of this band is discussed in terms of theoretical models given in the literature.
Link to this record: urn:nbn:de:bsz:291-scidok-24384
Date of registration: 2-Nov-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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