Stabilization of Uranyl Cations in Molten Sodium Polysulfide and Formation of the Novel Solid Oxysulfide Na_4(UO_2)Cu_2S_4

摘要

The results presented here clearly suggest the uranyl cation to be a chemically compatible and robust building block in molten A_2tQ_x fluxes. Not only does the synthesis of Na_4(UO_2)- Cu_2S_4 call for a further examination of (UO_2)~2+ chemistry in other A_2tQ_x congeners but also gives a strong indication that other oxymetal cations such as (TiO)~2+, (VO)~2+, (MoO)~3+, and (WO)~3+ could be stable in A_2Q_x fluxes as well.