Powder diffraction data for U₃O₅P₂O₇

Abstract

X‐ray powder diffraction data have been obtained for U3O5P2O7. This compound has not yet been mentioned in the literature, although similar diffraction data have been reported for a compound described as (UO)3(PO4)2.

Thermogravimetric study of uranium phosphates

“…It was, however, observed that the X-ray diffraction pattern of the crystalline sample of U3OsP~O7 [19], described above, was nearly identical with that for (UO)z(PO4)2 reported by Burdese and Borlera. It is therefore not impossible that their product was actually UaQP2OT, which might have been formed by oxidation of the mixture [UOz + (UO)2P~OT] by traces of oxygen in the inert gas they used.…”

Synthesis and characterization of uranium (IV) phosphate-hydrogenphosphate hydrate and cerium (IV) phosphate-hydrogenphosphate hydrate

“…In this study, the synthesis of cerium (IV) phosphatehydrogenphosphate hydrate was undertaken in the same conditions as UPHPH using (NH 4 ) 2 Ce(NO 3 ) 6 and H 3 PO 4 solutions. For this sample, the EPMA results are given in Table 1 while the SEM micrographs are presented in Fig.…”

“…Tetravalent uranium phosphates were extensively studied in the past [1][2][3][4][5][6][7][8][9][10][11]. However, their chemistry required to be revised since the general physico-chemical properties of these solids (and especially their low solubility) appear of particular interest for their potential use as conditioning matrices for radioactive waste.…”

On the determination of unit-cell dimensions from inaccurate powder diffraction data

“…In an article by Schaekers & Greybe (1973) a powder pattern from U305P207 is given and compared with a pattern from a compound (UO)3(PO4)2 published in the paper by Burdese & Borlera (1963) discussed above. Schaekers & Greybe claim that the two powder patterns arise from the same compound, U3OsP2Ov.…”