Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-03T02:56:42.628Z Has data issue: false hasContentIssue false
  • English
  • Français

Chemical Composition, Geochemical Alteration, and Radiation Damage Effects in Natural Perovskite

Published online by Cambridge University Press:  10 February 2011

Gregory R. Lumpkin ,
Michael Colella ,
Katherine L. Smith ,
Roger H. Mitchell  and
Alf Olav Larsen
Gregory R. Lumpkin
Affiliation:
Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW 2234, Australia
Michael Colella
Affiliation:
Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW 2234, Australia
Katherine L. Smith
Affiliation:
Australian Nuclear Science and Technology Organisation, PMB 1, Menai, NSW 2234, Australia
Roger H. Mitchell
Affiliation:
Dept. of Geology, Lakehead Univ., 955 Oliver Road, Thunder Bay, Ontario, Canada, P7B 5E]
Alf Olav Larsen
Affiliation:
Norsk Hydro a.s., Research Centre Porsgrunn, N-3901 Porsgrunn, Norway
Get access

Abstract

Preliminary analytical and transmission electron microscopy (AEM and TEM) results for a small suite of natural perovskites are reported in this paper and discussed in relation to previous work. We show that perovskite compositions in Synroc and tailored ceramics plot within the known fields of natural perovskite compositions. AEM analyses and electron diffraction work on selected samples indicate that they are predominantly stoichiometric variants of the cubic perovskite structure. Geochemical alteration was observed in one sample of loparite from Bratthagen, Norway. The primary result of this alteration was leaching of Na from the A-site. Although sufficient alpha-decay dose levels for complete amorphization are not realized in this suite of samples, the available data bracket the beginning of the crystalline-amorphous transformation at doses that are ∼ 2-4 times greater than those of zirconolite of similar age. These results may be due to fundamental differences in the damage annealing rates of perovskite and zirconolite.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 506: Symposium – Scientific Basis for Nuclear Waste Management XXI , 1997 , 207
Copyright
Copyright © Materials Research Society 1998

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 Ringwood, A.E., Kesson, S.E., Reeve, K.D., Levins, D.M., and Ramm, E.J., in Radioactive Waste Forms for the Future, edited by Lutze, W. and Ewing, R.C. (Elsevier, New York, 1988) p. 233.Google Scholar
2 Harker, A.B., in Radioactive Waste Forms for the Future, edited by Lutze, W. and Ewing, R.C. (Elsevier, New York, 1988) p. 335.Google Scholar
3 Lumpkin, G.R., Smith, K.L., and Blackford, M.G., J. Mater. Res. 6, 2218 (1991).Google Scholar
4 Smith, K.L., Lumpkin, G.R., Blackford, M.G., Day, R.A., and Hart, K.P., J. Nucl. Mater. 190, 287 (1992).Google Scholar
5 Lumpkin, G.R., Smith, K.L., and Blackford, M.G., J. Nucl. Mater. 224, 31 (1995).Google Scholar
6 Smith, K.L., Blackford, M.G., Lumpkin, G.R., Hart, K.P., and Robinson, B.J., in Scientific Basis for Nuclear Waste Management XIX, edited by Murphy, W.M. and Knecht, D.A. (Mater. Res. Soc. Proc. 412, Pittsburgh, PA, 1996) pp. 313–319.Google Scholar
7 Mosley, W.C., J. Amer. Ceram. Soc. 54, 475 (1971).Google Scholar
8 Clinard, F.W. Jr., Rohr, D.L., and Roof, R.B., Nucl. Instr. Meth. Phys. Res. B1, 581 (1984).Google Scholar
9 Weber, W.J., Wald, J.W., and Matzke, Hj., J. Nucl. Mater. 138, 196 (1986).Google Scholar
10 White, T.J., Ewing, R.C., Wang, L.M., Forrester, J.S., and Montross, C., in Scientific Basis for Nuclear Waste Management XVIII, edited by Murakami, T. and Ewing, R.C. (Mater. Res. Soc. Proc. 353, Pittsburgh, PA, 1995) pp. 1413–1420.Google Scholar
11 Smith, K.L., Zaluzec, N.J., and Lumpkin, G.R., J. Nucl. Mater., in press.Google Scholar
12 Lumpkin, G.R., Smith, K.L., Blackford, M.G., Gieré, R., and Williams, C.T., Micron 25, 581 (1994).Google Scholar
13 Lumpkin, G.R., Smith, K.L., and Gieré, R., Micron 28, 57 (1997).Google Scholar
14 Mitchell, R.H., in Rare Earth Minerals, edited by Jones, A.P., Wall, F.W., and Williams, C.T. (Chapman and Hall, London, 1996) p. 41.Google Scholar
15 Ryerson, F.J., J. Amer. Ceram. Soc. 67, 75 (1984).Google Scholar
16 Hawkins, K.D. and White, T.J., Phil. Trans. R. Soc. Lond. A 336, 541 (1991).Google Scholar
17 White, T.J., Segall, R.L., Barry, J.C., and Hutchison, J.L., Acta Cryst. B41, 93 (1985).Google Scholar
18 Lumpkin, G.R., Hart, K.P., McGlinn, P.J., Payne, T.E., Gieré, R., and Williams, C.T., Radiochim. Acta 66/67, 469 (1994).Google Scholar
19 Lumpkin, G.R., Smith, K.L., Blackford, M.G., Gieré, R., and Williams, C.T., in Scientific Basis for Nuclear Waste Management XXI, in press.Google Scholar
20 Vance, E.R., Day, R.A., Zhang, Z., Begg, B.D., Ball, C.J., and Blackford, M.G., J. Sol. St. Chem. 124, 77 (1996).Google Scholar
21 Nesbitt, H.W., Bancroft, G.M., Fyfe, W.S., Karkhanis, S.N., and Nishijima, A., Nature 289, 358 (1981).Google Scholar
22 Mariano, A.N., in Geochemistry and Mineralogy of Rare Earth Elements, edited by Lipin, B.R. and McKay, G.A. (Mineralogical Society of America, Washington, D.C., 1989) p. 309.Google Scholar
23 Lumpkin, G.R., Smith, K.L., and Blackford, M.G., in Scientific Basis for Nuclear Waste Management XVIII, edited by Murakami, T. and Ewing, R.C. (Mater. Res. Soc. Proc. 353, Pittsburgh, PA, 1995) pp. 855–862.Google Scholar