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| Hauptseite > Publikationsdatenbank > Further Insight into Uranium and Thorium Metaphosphate Chemistry and the Effect of Nd$ ^{3+}$ Incorporation into Uranium(IV) Metaphosphate |
| Hauptseite > Publikationsdatenbank > Further Insight into Uranium and Thorium Metaphosphate Chemistry and the Effect of Nd$ ^{3+}$ Incorporation into Uranium(IV) Metaphosphate |
| Journal Article | FZJ-2015-05881 |
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2015
Wiley-VCH
Weinheim
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Please use a persistent id in citations: doi:10.1002/ejic.201403098
Abstract: A tetragonal modification of uranium polymetaphosphate U(PO3)4, a mixed U4+/Nd3+ polymetaphosphate “(U0.62Nd0.38)(PO3)4”, and two new tetraphosphates, Th(P4O12) and U(P4O12), were synthesized. The structures of the obtained materials were characterized by X-ray diffraction and Raman spectroscopy. The presence of Nd in (U0.62Nd0.38)(PO3)4 was proven by energy-dispersive X-ray spectroscopy (EDX), and the measured degree of substitution for U agrees well with the X-ray crystallography results; however, the mechanism of the necessary charge compensation could not be identified. The cation arrangements in the crystal structures of thorium and uranium polymetaphosphates have been studied in terms of Voronoi–Dirichlet polyhedra. Different conformations of the tetraphosphate polyanions were observed in the crystal structures of Th(P4O12) and U(P4O12). The Raman spectrum of a single crystal of Th(P4O12) was recorded, and the bands were assigned.
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