Raman Investigation Of Zrf[sub]4[/sub]-Based Glasses Over A Wide Range Of Stoichiometric F/Zr Mole Ratios

G E Walrafen; M S Hokmabadi; M R Shariari; G H Sigel Jr.; R Pafchek; A Elyamani; M Poulain

doi:10.1117/12.945862

18 July 1988 Raman Investigation Of Zrf₄-Based Glasses Over A Wide Range Of Stoichiometric F/Zr Mole Ratios

G E Walrafen, M S Hokmabadi, M R Shariari, G H Sigel Jr., R Pafchek, A Elyamani, M Poulain

Proceedings Volume 0929, Infrared Optical Materials IV; (1988) https://doi.org/10.1117/12.945862
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

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 605Ã‚Â±10 cm-1 (at F/Zr = 4.64) to 560Ã‚Â±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.

Citation Download Citation

G E Walrafen, M S Hokmabadi, M R Shariari, G H Sigel Jr., R Pafchek, A Elyamani, and 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); https://doi.org/10.1117/12.945862

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