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Proceedings Paper

Raman Investigation Of Zrf[sub]4[/sub]-Based Glasses Over A Wide Range Of Stoichiometric F/Zr Mole Ratios
Author(s): G E Walrafen; M S Hokmabadi; M R Shariari; G H Sigel; R Pafchek; A Elyamani; M Poulain
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Paper Abstract

The intense polarized Raman Zr-F stretching frequency, √s, was examined for fluorozirconate glasses having stoichiometric F/Zr ratios from =4.6 to 8.0. This frequency was observed to decrease at a decreasing rate, from 605±10 cm-1 (at F/Zr = 4.64) to 560±10 cm-1 (at F/Zr = 8), and finally to =555 cm-1 (melt, at F/Zr = 10). This decrease suggests the presence of a succession of complex anions, e.g., ZrF5-, ZrF62-, and ZrF73-, as well as ZrFs4-, and possibly the neutral species ZrF4. A decrease in the symmetric Zr-F stretching force constants resulting from increasing Zr-F distances is thought to explain the observed nonlinear decrease in the I√s frequency.

Paper Details

Date Published: 18 July 1988
PDF: 16 pages
Proc. SPIE 0929, Infrared Optical Materials IV, (18 July 1988); doi: 10.1117/12.945862
Show Author Affiliations
G E Walrafen, Howard University (United States)
M S Hokmabadi, Howard University (United States)
M R Shariari, Rutgers University (United States)
G H Sigel, Rutgers University (United States)
R Pafchek, Rutgers University (United States)
A Elyamani, Universite de Rennes (France)
M Poulain, Universite de Rennes (France)

Published in SPIE Proceedings Vol. 0929:
Infrared Optical Materials IV
Solomon Musikant, Editor(s)

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