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Wallez, G., Bregiroux, D., Popa, K., Raison, P. E., Apostolidis, C., Lindqvist-Reis, P., Konings, R. J. M. & Popa, A. F. (2011) BaAn(IV)(PO4)(2) (An(IV) = Th, Np) - A New Family of Layered Double Phosphates. Eur. J. Inorg. Chem. 110–115.
Added by: Laurent Cournède (2016-03-10 21:32:21) |
| Type de référence: Article DOI: 10.1002/ejic.201000777 Numéro d'identification (ISBN etc.): 1434-1948 Clé BibTeX: Wallez2011 Voir tous les détails bibliographiques  |
Catégories: CESES Mots-clés: Actinides, barium zirconium diorthophosphate, Ceramics, cheralite, crystal-structure, high-temperature behavior, hydrothermal alteration, Layered compounds, monazite-type compounds, phosphates, Raman spectroscopy, Solid-state structures, solid-state synthesis, solubility, thermal-expansion Créateurs: Apostolidis, Bregiroux, Konings, Lindqvist-Reis, Popa, Popa, Raison, Wallez Collection: Eur. J. Inorg. Chem. |
Consultations : 1/601
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| Résumé |
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BaTh(PO4)(2) has been synthesized by a wet chemistry route and the new isotype BaNp(PO4)(2) by solid-state reaction. Although the former has been the subject of several studies since the early 1980s, the crystal structures of both compounds are reported here for the first time. Rietveld analysis shows Ba layers alternating with An(PO4)(2) slabs along the alpha axis. Although those compounds are isostructural to RbEu(SO4)(2), these phosphates can be seen as modified yavapaiite derivatives with increased coordination numbers for Ba (XIV) and Th/Np (VIII). Raman and electron absorption spectra highlight the similarities and differences with chemically related compounds.
Added by: Laurent Cournède |