Abstract
XANES and EXAFS data were collected and analyzed to characterize vanadium in borosilicate glasses used for immobilization of sulfur-containing nuclear wastes. Earlier studies suggested that adding vanadium to the melt improves sulfur solubility. Data are presented for a variety of borosilicate glasses, some containing sulfur and some sulfur-free, that have V2O5 concentrations as high as 12 wt%, and for crystalline vanadium sulfide, silicate, and oxide standards. The data for all glasses investigated indicate that most or all vanadium has a+5 valence and is tetrahedrally coordinated by oxygen atoms. Both XANES and EXAFS also show that glasses synthesized under reducing conditions can have pentacoordinated V+4 populations up to approximately 20 to 25% of all vanadium present with the remainder being V+5O4. There is no evidence from XANES or EXAFS of V-S bonds in any of the glasses investigated.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
W.K. Kot, H. Gan, and I.L. Pegg, Ceramic Transactions, 107, 441 (2000).
S.V. Stephanovskii and F.A. Lifanov, Radiokhimiya. 31, 129 (1990).
K.S. Matlack, H. Hojaji, S.S. Fu, I.L. Pegg, and P.B. Macedo, Ceramic Transactions, 61, 221 (1995).
S.S. Fu, W. Luo, H. Hojaji, M. Brandys, R.K. Mohr, K.S. Matlack, I.L. Pegg, and P.B. Macedo, Ceramic Transactions, 72, 27 (1996).
F.J. Trojer, Am. Min., 51, 890 (1966).
A. Kutoglu and R. Allmann, Jahrb. f. Min., Monatsh., 22, 339 (1972).
H.T. Evans, Am. Min., 58, 412 (1973).
Y. Takeuchi and W. Joswig, Min. Journal (Japan), 5, 98 (1967).
E.W. Heinrich and A.A. Levinson, Amer. J. Sci., 253, 39 (1955).
Y. Dai and J. Hugnes, Canad. Min., 27, 189 (1989).
J. Wong, F.W. Lytle, R.P. Messmer, and D.H. Maylotte, Phys. Rev., B30, 5596 (1984).
D.E. Sayers and B.A. Bunker in: X-ray Absorption Principles, Applications, Techniques of EXAFS, SEXAFS, and XANES, ed. D.C. Kroningsberger, R. Prins (Wiley, New York, 1988), ch. 6, p.211.
S.I. Zabinsky, J.J. Rehr, A. Ankudinov, R.C. Albers, and M.J. Eller, Phys. Rev. Letters, B 52, 2995 (1995).
M. Newville, B. Ravel, D. Haskel, E.A. Stern, and Y. Yacoby, Physica, B 208-209, 154 (1995).
M. Nabavi, F. Taulelle, C. Sanchez, and M. Verdaguer, J. Phys. Chem. Solids, 51, 1375 (1990).
H.D. Schreiber, J. Geophys. Res., 92, 9225 (1987).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
McKeown, D.A., Muller, I.S., Matlack, K.S. et al. X-ray Absorption Studies of Vanadium Valence and Local Environment in Borosilicate Waste Glasses. MRS Online Proceedings Library 713, 132 (2001). https://doi.org/10.1557/PROC-713-JJ13.2
Published:
DOI: https://doi.org/10.1557/PROC-713-JJ13.2