Solvation of gold and rare earths by tributyl phosphate

Frozen solution samples were made from gold chloride and KAu(CN)(2) solvated with TBP/xylene. The Au-197 Mossbauer parameters were similar to those same species as frozen solutions or adsorbed onto activated carbon. Solvated samples from EuO dissolved in HCl or H2SO4 and frozen gave characteristic Eu(III) spectra. All the spectra were consistent with bonding to the TBP being through hydronium ions or water molecules.