18 July 1988 Raman Investigation Of Zrf4-Based Glasses Over A Wide Range Of Stoichiometric F/Zr Mole Ratios
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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.
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G E Walrafen, G E Walrafen, M S Hokmabadi, M S Hokmabadi, M R Shariari, M R Shariari, G H Sigel, G H Sigel, R Pafchek, R Pafchek, A Elyamani, A Elyamani, M Poulain, M Poulain, } "Raman Investigation Of Zrf4-Based Glasses Over A Wide Range Of Stoichiometric F/Zr Mole Ratios", Proc. SPIE 0929, Infrared Optical Materials IV, (18 July 1988); doi: 10.1117/12.945862; https://doi.org/10.1117/12.945862
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