Hostname: page-component-cd9895bd7-lnqnp Total loading time: 0 Render date: 2024-12-28T23:37:14.886Z Has data issue: false hasContentIssue false
  • English
  • Français

Mn Oxidation States in Bax CsyMnzTi8-zO16

Published online by Cambridge University Press:  17 March 2011

M.L. Carter ,
E.R. Vance ,
D. R. G. Mitchell  and
Z. Zhang
M.L. Carter
Affiliation:
Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, NSW 2234, Australia School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia, mlc@ansto.gov.au
E.R. Vance
Affiliation:
Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, NSW 2234, Australia
D. R. G. Mitchell
Affiliation:
Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, NSW 2234, Australia
Z. Zhang
Affiliation:
Australian Nuclear Science and Technology Organisation, New Illawarra Rd, Lucas Heights, NSW 2234, Australia
Get access

Abstract

Two Bax CsyMnzTi8-zO16 hollandite samples, containing excess rutile, have been prepared, targeting the Mn valence as 3+ by sintering at 1300oC in air (z = 2x +y) and as 2+ (z = x + y/2) in argon. SEM showed the sample sintered in air to contain major hollandite and minor Mn titanate and rutile. The sample sintered in argon contain major hollandite, and minor Ba titanate and rutile. X-ray absorption near edge spectroscopy (XANES), electron energy loss spectroscopy (EELS) and X-ray photoelectron spectroscopy (XPS) were used to determine the oxidation state of the Mn in the samples. Transmission manganese K-edge X-ray absorption spectra of the samples were similar but the precise ratio of oxidation states could not be calculated from these spectra.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 824: Symposium CC – Scientific Basis for Nuclear Waste Management XXVIII , 2004 , CC4.6
Copyright
Copyright © Materials Research Society 2004

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

[1] Kesson, S.E., Radioact. Waste Manage. Nucl. Fuel Cycle, 2, 53–71 (1983)Google Scholar
[2] Carter, M. L., Vance, E. R., Mitchell, D. R. G., Hanna, J. V., Zhang, Z. and Loi, E., J. Mater. Res., 17 (10), 2578–89 (2002).Google Scholar
[3] Carter, M.L., Vance, E.R. and Li, H., ‘Hollandite-rich Titanate Ceramics Prepared by Melting in Air’, presented at the 105th Annual meeting of The American Ceramic Society, April 27-30, 2003, Nashville, Tennessee. To be publishedGoogle Scholar
[4] Bart, F., Berbon, H. and Leturco, G., ‘Iron-Substituted Ba-Hollandite Ceramics for Cesium Immobilization”, presented at the 105th Annual meeting of The American Ceramic Society, April 27-30, 2003, Nashville Tennessee. To be publishedGoogle Scholar
[5] Carter, M.L., Vance, E.R. and Li, H.,' Hollandite-rich Ceramic Melts for the Immobilisation of Cs', presented at MRS, June 15-19th 2003, Kalmar, Sweden. To be published in Scientific Basis for Nuclear Waste Management XXVI.Google Scholar
[6] Cheary, R.W., Acta. Cryst. B43, 28–34 (1987).Google Scholar
[7] Kesson, S.E. and White, T.J., Proc. Roy. Soc. Lond. A408, 73–101 (1986).Google Scholar
[8] Ringwood, A.E., Kesson, S.E., Reeve, K.D., Levins, D.M. and Ramm, E.J., ‘Synroc”, in Radioactive Waste Forms for the Future, edited by Lutze, W. and Ewing, R.C., (North-Holland, New York, 1988) p. 233.Google Scholar
[9] Leapman, R. D., Grunes, L. A. and Fejes, P. L., Phys. Rev. B, 26, 614–635 (1982).Google Scholar
[10] Garvie, L. A. J. and Buseck, P. R., J. Phys. Chem. Solids, 60, 1943–1947 (1999).Google Scholar
[11] Garvie, L. A. J. and Craven, A. J., Amer. Mineralogist, 79, 411–425 (1994)Google Scholar
[12] Wang, Z. L., Bentley, J. and Evans, N. D., J. Phys. Chem. B, 103, 751–753 (1999).Google Scholar
[13] Zaw, M., Szymczak, R. and Twining, J., Nucl. Instr. and Meth. Phys. Res. B 190 856–859 (2002).Google Scholar
[14] Castro, V. Di and Polzonetti, G., J. Electron Spectrosc. Relat. Phenom. 48, 117–123 (1989).Google Scholar
[15] Oku, M. and Hirokawa, K., J. Electron Spectrosc. Relat. Phenom. 8, 475–481 (1976).Google Scholar