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Raman spectroscopy study of high B 2 O 3 content lead fluoroborate glasses
Author(s) -
Filho A. G. Souza,
Guedes I.,
Freire P. T. C.,
Filho J. Mendes,
Custódio M. C. C.,
Lebullenger R. M.,
Hernandes A. C.
Publication year - 1999
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/(sici)1097-4555(199907)30:7<525::aid-jrs412>3.0.co;2-o
Subject(s) - raman spectroscopy , boron , borate glass , ion , infrared spectroscopy , chemistry , fluorine , analytical chemistry (journal) , infrared , mineralogy , inorganic chemistry , organic chemistry , optics , physics
Several compositions in the (50 − x ) PbO– x PbF 2 –50B 2 O 3 (0 ≤ x ≤ 20) mol% vitreous system were systematically characterized at room temperature by infrared and Raman microscopic analysis. A general assignment of the vibrations observed for x = 0 mol% was proposed on the basis of borate units and correlations with other lead borate glass systems. By observing the behavior of these vibrations as a function of PbF 2 content. It was verified that the effect of the addition of fluorine ions to the glass network is twofold, namely; (i) the destruction of PbO 4 pyramids and (ii) the conversion of threefold to fourfold coordinated boron atoms. Copyright © 1999 John Wiley & Sons, Ltd.