Hostname: page-component-84b7d79bbc-2l2gl Total loading time: 0 Render date: 2024-07-26T02:14:30.465Z Has data issue: false hasContentIssue false
  • English
  • Français

Natural Pyrochlores: Analogues For Actinide Host Phases in Radioactive Waste Forms

Published online by Cambridge University Press:  26 February 2011

Gregory R. Lumpkin  and
Rodney C. Ewing
Gregory R. Lumpkin
Affiliation:
University of New Mexico, Geology Department, Albuquerque, NM 87131
Rodney C. Ewing
Affiliation:
University of New Mexico, Geology Department, Albuquerque, NM 87131
Get access

Abstract

Significant amounts of the pyrochlore structure type, and derivative structures like zirconolite, have been reported to occur in crystalline, polyphase, nuclear waste forms [1,2,3,4]. Pyrochlore has abundant and chemically diverse natural analogues. Many of these contain U and Th and have been transformed to the electron-diffraction amorphous, “metamict” state by alpha-recoil nuclei. A variety of geochemical alteration processes may occur before, during, and after reaching the final saturation level for alpha-recoil damage (∼1026 alpha-events/m3 ). The purpose of this paper is to examine these alteration effects in radiation-damaged natural pyrochlores.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 44: Symposium N – Scientific Basis for Nuclear Waste Management VIII , 1984 , 647
Copyright
Copyright © Materials Research Society 1985

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. and Ringwood, A.E., The Scientific Basis for Nuclear Waste Management VII, edited by McVay, G., (Elsevier Science Publishing Co., New York, 1984), p. 507–512.Google Scholar
[2] Harker, A.B. and Flintoff, J.F., The Scientific Basis for Nuclear Waste Management VII, edited by McVay, G., (Elsevier Science Publishing Co., New York, 1984), p. 513–520.Google Scholar
[3] Morgan, P.E.D., Shaw, T.M. and Pugar, E.A., Advances in Ceramics Vol.8, edited by Wicks, G.G. and Ross, W.A., (The American Ceramic Society, Inc., Columbus, Ohio, 1984), p. 209–221.Google Scholar
[4] Morgan, P.E.D., Harker, A.B., Flintoff, J.F., Shaw, T.M. and Clarke, D.R., Advances in Ceramics Vol.8, edited by Wicks, G.G. and Ross, W.A., (The American Ceramic Society, Inc., Columbus, Ohio, 1984), p. 234–246.Google Scholar
[5] Hogarth, D.D., Am. Mineral. 62, 403 (1977).Google Scholar
[6] Van Wambeke, L., Neues Jahrb. fur Mineral., Abh. 112, 117 (1970).Google Scholar
[7] Ewing, R.C., Geochim. Cosmochim. Acta 39, 521 (1975).Google Scholar
[8] Jahns, R.H. and Ewing, R.C., Mineral. Rec. 8, 115 (1977).Google Scholar
[9] Harris, P.M., Mineral. Mag. 35, 277 (1965).Google Scholar
[10] Borodin, L.S. and Nazarenko, I.I., Geochemistry 4, 330 (1957).Google Scholar
[11] Van Wambeke, L., Am. Mineral. 63, 528 (1978).Google Scholar
[12] Jager, E., Niggli, E. and Van der Veen, A.H., Mineral. Mag. 32, 10 (1959).Google Scholar
[13] Safiannikoff, A. and Van Wambeke, L., Bull. Soc. franc. Minèral. Crist. 84, 382 (1961).Google Scholar
[14] Von Knorring, O. and Fadipe, A., Bull. Mineral. 104, 496 (1981).Google Scholar