ChemInform Abstract The hitherto unknown title compound (I) is prepared in aqueous solution at room temp. from Na4XeO6•3 H2O, La(OAc)3 and Ba(OAc)2 (yields given in g). It is contaminated by Na2CO3 and H2O. (I) is characterized by its X-ray, IR and Raman pectra. Furthermore, its thermal stability and its solubility in water (maximum concentration attainable 7.9•10-7 M) are investigated. For a comparison lanthanum perxenate and barium perxenate are prepared. A mixture of these compounds displays spectral data that are learly different from those of the title compound (I).
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