Hostname: page-component-586b7cd67f-rcrh6 Total loading time: 0 Render date: 2024-11-25T17:52:42.504Z Has data issue: false hasContentIssue false
  • English
  • Français

X-ray Absorption Studies of Vanadium Valence and Local Environment in Borosilicate Waste Glasses

Published online by Cambridge University Press:  21 March 2011

David A. McKeown ,
Isabelle S. Muller ,
Keith S. Matlack  and
Ian L. Pegg
David A. McKeown
Affiliation:
Vitreous State Laboratory, The Catholic University of America, 620 Michigan Ave, N.E., Washington, D.C. 20064
Isabelle S. Muller
Affiliation:
Vitreous State Laboratory, The Catholic University of America, 620 Michigan Ave, N.E., Washington, D.C. 20064
Keith S. Matlack
Affiliation:
Vitreous State Laboratory, The Catholic University of America, 620 Michigan Ave, N.E., Washington, D.C. 20064
Ian L. Pegg
Affiliation:
Vitreous State Laboratory, The Catholic University of America, 620 Michigan Ave, N.E., Washington, D.C. 20064
Get access

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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 713: Symposium JJ – Scientific Basis for Nuclear Waste Management XXV , 2002 , JJ13.2
Copyright
Copyright © Materials Research Society 2002

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Kot, W.K., Gan, H., and Pegg, I.L., Ceramic Transactions, 107, 441 (2000).Google Scholar
2. Stephanovskii, S.V. and Lifanov, F.A., Radiokhimiya. 31, 129 (1990).Google Scholar
3. Matlack, K.S., Hojaji, H., Fu, S.S., Pegg, I.L., and Macedo, P.B., Ceramic Transactions, 61, 221 (1995).Google Scholar
4. Fu, S.S., Luo, W., Hojaji, H., Brandys, M., Mohr, R.K., Matlack, K.S., Pegg, I.L., and Macedo, P.B., Ceramic Transactions, 72, 27 (1996).Google Scholar
5. Trojer, F.J., Am. Min., 51, 890 (1966).Google Scholar
6. Kutoglu, A. and Allmann, R., Jahrb. f. Min., Monatsh., 22, 339 (1972).Google Scholar
7. Evans, H.T., Am. Min., 58, 412 (1973).Google Scholar
8. Takeuchi, Y. and Joswig, W., Min. Journal (Japan), 5, 98 (1967).Google Scholar
9. Heinrich, E.W. and Levinson, A.A., Amer. J. Sci., 253, 39 (1955).Google Scholar
10. and, Y. Dai Hugnes, J., Canad. Min., 27, 189 (1989).Google Scholar
11. Wong, J., Lytle, F.W., Messmer, R.P., and Maylotte, D.H., Phys. Rev., B30, 5596 (1984).Google Scholar
12. Sayers, D.E. and Bunker, B.A. in: X-ray Absorption Principles, Applications, Techniques of EXAFS, SEXAFS, and XANES, ed. Kroningsberger, D.C., Prins, R. (Wiley, New York, 1988), ch. 6, p. 211.Google Scholar
13. Zabinsky, S.I., Rehr, J.J., Ankudinov, A., Albers, R.C., and Eller, M.J., Phys. Rev. Letters, B 52, 2995 (1995).Google Scholar
14. Newville, M., Ravel, B., Haskel, D., Stern, E.A., and Yacoby, Y., Physica, B 208–209, 154 (1995).Google Scholar
15. Nabavi, M., Taulelle, F., Sanchez, C., and Verdaguer, M., J. Phys. Chem. Solids, 51, 1375 (1990).Google Scholar
16. Schreiber, H.D., J. Geophys. Res., 92, 9225 (1987).Google Scholar