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Artificial Compounds of the Crandallite Type; A new Material for Separation and Immobilization of Fission Products

Published online by Cambridge University Press:  26 February 2011

R. Ballhorn ,
H. Brunner  and
R. C. Schwab
R. Ballhorn
Affiliation:
Berzelius Umwelt Service, Bockenheimer Landstraβe 24, D-6000 Frankfurt/Main, Federal Republik of, Germany
H. Brunner
Affiliation:
Thermalkem, P.O. Box 2664. Rock Hill, S.C., U.S.A.
R. C. Schwab
Affiliation:
Mineralogisches Institut der Universität Erlangen, Schloβgarten 5a, D-8520 Erlangen, Federal Republic of, Germany
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Abstract

Minerals of the crandallite group (Ca, Sr. Ba, Pb, REE) H Al3((po4) 2/(OH)6) exhibit manifold possibilities for element substitutions. They occur as hydrothermal precipitates together with tin tungsten mineralization [1], as placer minerals [2], neo-formed minerals in lateritic profiles [3, 4] and lake sediments [5].

An easy and cheap method of synthesizing an artificial crandallite-type material was developed. By adding 4.2 g of crandallite to an aqueous solution containing 300 g/l sodium nitrate, 0.6 g/l europium nitrate and 0.6 g/l thorium nitrate, europium and thorium were effectively separated from the solution. This was also demonstrated for Ce. La, Nd, Gd, Zr, Ba and Sr.

Artificial crandallite-type material laden with strontium was subjected to a Soxlet test. A dissolution of strontium of 0.06 to 0.08 wt.% with reference to the total strontium content resulted. As shown by Herold [6] the substitution of Ca by larger bivalent or higher charged ions results in an increase in the thermodynamic and thermal stability of artificial crandallites.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 127: Symposium BERLIN – Scientific Basis for Nuclear Waste Management XII , 1988 , 249
Copyright
Copyright © Materials Research Society 1989

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References

REFERENCES

1. Taylor, M., Smith, R.W. and Ahler, B.A., Am. Mineral. 69, 984–986, (1984).Google Scholar
2. Milton, Ch. and Narain, S., Econ. Geol. 64, 910–914 (1969).Google Scholar
3. Schwab, R.C. and De Oliveira, N.P., Zbi. Geol. Paläont., H. 3/4, 419–436 (1981).Google Scholar
4. Schwab, R.G., Lima da Costa, M. and De Oliveira, N.P., Zbl. Geol. Paläont., H 3/4, 563–580 (1983).Google Scholar
5. Ballhorn, R.K., Rassi, D. and Watson, J.H.P., JEEE Transactions on Magnetics, 20, 1201–1203 (1984).CrossRefGoogle Scholar
6. Herold, H., PhD thesis, Friedrich-Alexander Universität, Erlangen-Nürnberg, 1987 (unpublished).Google Scholar
7. Bhaskara, R.A. and Cunha, E.S., Journ. Min. Recife, Ed. Espi. 6, 99–121 (1968).Google Scholar
8. Kapustin, Y. L., The mineralogy of Carbonatites, Nauka Press, Moscow, 228 p. (1971).Google Scholar
9. Palache, Ch., Berman, H. and Frondel, C., Danas System of Mineralogy, Vol. II, Wiley New York (1951).Google Scholar
10. Gilkes, R.J. and Palmer, B., Min. Mag. 47, 221–227 (1983).CrossRefGoogle Scholar