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Title: Structure of rhenium-containing sodium borosilicate glass

Abstract

A series of sodium borosilicate glasses were synthesized with increasing fractions of KReO4 or Re2O7, to 10000 ppm (1 mass%) target Re in glass, to assess the effects of large concentrations of rhenium on glass structure and to estimate the solubility of technetium, a radioactive component in typical low active waste nuclear waste glasses. Magic angle spinning nuclear magnetic resonance (MAS-NMR), Fourier transform infrared (FTIR) spectroscopy, and Raman spectroscopy were performed to characterize the glasses as a function of Re source additions. In general, silicon was found coordinated in a mixture of Q2 and Q3 structural units, while Al was 4-coordinated and B was largely 3-coordinate and partially 4-coordinated. The rhenium source did not appear to have significant effects on the glass structure. Thus, at the up to the concentrations that remain in dissolved in glass, ~3000 ppm Re by mass maximum. , the Re appeared to be neither a glass-former nor a strong glass modifier., Rhenium likely exists in isolated ReO4- anions in the interstices of the glass network, as evidenced by the polarized Raman spectrum of the Re glass in the absence of sulfate. Analogous to SO42-¬ in similar glasses, ReO4- is likely a network modifier and formsmore » alkali salt phases on the surface and in the bulk glass above solubility.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1072852
Report Number(s):
PNNL-SA-89618
830403000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
International Journal of Applied Glass Science, 4(1):42-52
Additional Journal Information:
Journal Name: International Journal of Applied Glass Science, 4(1):42-52
Country of Publication:
United States
Language:
English
Subject:
radioactive waste; technetium; rhenium; crystallization; borosilicate glass

Citation Formats

Goel, Ashutosh, McCloy, John S., Windisch, Charles F., Riley, Brian J., Schweiger, Michael J., Rodriguez, Carmen P., and Ferreira, Jose M. Structure of rhenium-containing sodium borosilicate glass. United States: N. p., 2013. Web. doi:10.1111/ijag.12003.
Goel, Ashutosh, McCloy, John S., Windisch, Charles F., Riley, Brian J., Schweiger, Michael J., Rodriguez, Carmen P., & Ferreira, Jose M. Structure of rhenium-containing sodium borosilicate glass. United States. doi:10.1111/ijag.12003.
Goel, Ashutosh, McCloy, John S., Windisch, Charles F., Riley, Brian J., Schweiger, Michael J., Rodriguez, Carmen P., and Ferreira, Jose M. Fri . "Structure of rhenium-containing sodium borosilicate glass". United States. doi:10.1111/ijag.12003.
@article{osti_1072852,
title = {Structure of rhenium-containing sodium borosilicate glass},
author = {Goel, Ashutosh and McCloy, John S. and Windisch, Charles F. and Riley, Brian J. and Schweiger, Michael J. and Rodriguez, Carmen P. and Ferreira, Jose M.},
abstractNote = {A series of sodium borosilicate glasses were synthesized with increasing fractions of KReO4 or Re2O7, to 10000 ppm (1 mass%) target Re in glass, to assess the effects of large concentrations of rhenium on glass structure and to estimate the solubility of technetium, a radioactive component in typical low active waste nuclear waste glasses. Magic angle spinning nuclear magnetic resonance (MAS-NMR), Fourier transform infrared (FTIR) spectroscopy, and Raman spectroscopy were performed to characterize the glasses as a function of Re source additions. In general, silicon was found coordinated in a mixture of Q2 and Q3 structural units, while Al was 4-coordinated and B was largely 3-coordinate and partially 4-coordinated. The rhenium source did not appear to have significant effects on the glass structure. Thus, at the up to the concentrations that remain in dissolved in glass, ~3000 ppm Re by mass maximum. , the Re appeared to be neither a glass-former nor a strong glass modifier., Rhenium likely exists in isolated ReO4- anions in the interstices of the glass network, as evidenced by the polarized Raman spectrum of the Re glass in the absence of sulfate. Analogous to SO42-¬ in similar glasses, ReO4- is likely a network modifier and forms alkali salt phases on the surface and in the bulk glass above solubility.},
doi = {10.1111/ijag.12003},
journal = {International Journal of Applied Glass Science, 4(1):42-52},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {3}
}