Synthesis and Characterisation of BaM^IV(PO₄)₂ in the View of Conditioning of the Actinides

Abstract:

We present here a systematic study on the BaMIV(PO4)2 double phosphates. We successfully synthesized the compounds with MIV = Ti, Zr, Hf, Ge, Sn and Th. Several attempts to obtain the compounds with MIV = Pb, Re, Ce, U and Np have been also performed and the preliminary findings are discussed here. In agreement with previous studies, the BaMIV(PO4)2 (MIV = Ti, Zr, Hf, Ge and Sn) compounds crystallize in the C1 2/m 1 space group (yavapaiite structure), while BaTh(PO4)2 exhibit a different structure. The results on the stability of the BaZr(PO4)2 and BaHf(PO4)2 yavapaiite-like compounds upon heating and cooling are presented.

• Periodical: Advances in Science and Technology (Volume 45)
• Pages: 2012-2017
• DOI: https://doi.org/10.4028/www.scientific.net/AST.45.2012
• Online since: October 2006
• Authors: Karin Popa, Rudy J.M. Konings, Daniel Bouëxière, A. Florin Popa, T. Geisler
• Keywords: Conditioning, Crystal Structure, Double Phosphate, Phase Transition

References

[1] V. Brandel and N. Dacheux, J. Sol. State Chem. 177 (2004) 4755-4767.

[2] R.C. Ewing, W.J. Weber and F.W. Clinard, Jr., Progr. Nucl. Energy 29 (1995) 63-127.

[3] R.D. Shannon, Acta Crystallogr. A 32 (1976) 751-767.

[4] R. Masse and A. Durif, C. R. Acad. Sc. (Paris) 274 (1972) 1692-1695.

[5] M.T. Paques-Ledent, J. Inorg. Nucl. Chem. 39 (1977) 11-17.

[6] K. Fukuda, A. Moriyama and T. Iwata, J. Sol. State Chem. 178 (2005) 2144-2151.

[7] K. Popa, R.J.M. Konings, P. Boulet, D. Bouëxière and A.F. Popa, Thermochim. Acta 436 (2005) 51-55.

DOI: 10.1016/j.tca.2005.06.035

[8] T. Geisler, K. Popa, R.J.M. Konings and A.F. Popa, J. Solid State Chem. 179 (2006) 1489-1495.

[9] K. Popa, T. Geisler, A.F. Popa, O. Beneš and R.J.M. Konings, Thermochim. Acta, submited.

[10] V. Brandel, N. Clavier and N. Dacheux, J. Solid State Chem. 178 (2005) 1054-1063.

[11] M. Nazaraly, G. Wallez, C. Chanéac, E. Tronc, F. Ribot, M. Quarton and J.P. Jolivet, Angew. Chem. Int. Ed. 44 (2005) 2691-5694.

DOI: 10.1002/anie.200501871

[12] M. Nazaraly, G. Wallez, C. Chanéac, E. Tronc, F. Ribot, M. Quarton and J.P. Jolivet, J. Phys. Chem. Solides (2006) in print.

DOI: 10.1016/j.jpcs.2006.01.028

[13] J.M. Montel, J.L. Devidal and D. Avignant, Chem. Geol. 191 (2002) 89-104.

[14] V. Brandel, N. Dacheux, J. Rousselle and M. Jenet, C. R. Chimie 5 (2002) 599-606.

[15] C.E. Bamberger: Phosphates of transuranium elements, in Handbook on the Physics and Chemistry of the Actinides, vol. III (eds: A.J. Freeman and C. Keller), North-Holland, Amsterdam, 1985, p.294.

[16] K. Popa, R.J.M. Konings, T. Wiss and H. Leiste, J. Radioanal. Nucl. Chem. (2006) in print.