Synthesis and characterization of the new uranium yttrium oxysulfide UY4O3S5

Reinvestigation of the Uranium(3.5+) Rare-Earth Oxysulfides “(UO)2LnS3” (Ln = Yb, Y)

“…One was the desired product UY 2 O 2 S 3 , which was obtained in about 5% yield. The other, which was obtained in about 10% yield, was the new compound UY 4 O 3 S 5 . Most of the UY 2 O 2 S 3 crystals were mixed with UOS or Y 2 S 3 .…”

“…Single-crystal absorption data, collected on several samples of UYb 2 O 2 S 3 and UY 2 O 2 S 3 , are reproducible. Typical spectra of ULn 2 O 2 S 3 are plotted together with that of UY 4 O 3 S 5 in Figure . The fine structures near the absorption edge that arise from U f−f transitions are very similar in all three compounds.…”

“…UY 2 O 2 S 3 was synthesized from a mixture of UOS (0.161 g, 0.563 mmol) and Y 2 S 3 (0.039 g, 0.140 mmol). The reaction product comprised long needles of UY 4 O 3 S 5 and dark-red square plates of UY 2 O 2 S 3 . The yields of UY 4 O 3 S 5 and UY 2 O 2 S 3 were about 10% and 5%, respectively, based on Y. Unreacted black UOS powder, orange Y 2 S 3 crystals, and black Sb 2 S 3 crystals were also present.…”

Synthesis, structure, and electrical resistivity of Cs3U18Se38

“…Atom U1 is coordinated by seven Se atoms in an augmented triangular prismatic geometry ( Fig. 3(a)) that is also found in UY 4 O 3 S 5 where it is referred to as a seven-octahedron [22]. Atom U2 (site symmetry ..m) is in a monocapped square antiprism ( Fig.…”

The Synthesis and Crystal Structure of U7O2Se12

“…Despite this compositional and structural variety for actinide chalcogenide compounds, ternary actinide oxychalcogenide compounds are limited to An O Q ( An = Th, U, Np, Q = S, Se, Te),8–19 An 2 O 2 Q ( An = U, Pu, Cf, Q = S, Te),20–22 U 4 O 4 Te 3 ,23 and Cm 10 OS 14 24. Other actinide oxychalcogenides include Ba 7 U M 2 S 12.5 O 0.5 ( M = V, Fe),25 UTa 2 O(S 2 ) 3 Cl 6 ,26 U Ln 2 O 2 Q 3 ( Ln = Er, Yb, Q = S, Se),27,28 (UO) 2 Ln S 3 ( Ln = Y, Yb),29 UY 4 O 3 S 5 ,30 U 2 LnO 4 Se 3 ( Ln = Pr, Sm, Gd),28 (UOS) 4 LuS,31 and a series of uranyl sulfides that feature [UO 2 ] 2+ ions 32–36…”