Requires Authentication
Unlicensed
Licensed
September 25, 2009
Abstract
Preparation, crystal structure and properties revealed through IR and visible absorption spectroscopy study of Np(V,VI), Pu(VI) compounds formed with pertechnetate anions are reported. Spectrophotometric study of Np(V) and Pu(VI) in NH 4 TcO 4 aqueous solutions (TcO 4 - concentration ranging between 0.2-0.5 M) shows only a slight interaction of NpO 2 + and PuO 2 2+ -ions with pertechnetate oxoanions in solution. On the contrary, for Np(V), Np(VI) and Pu(VI) pertechnetates in solid state, changes in the spectra clearly evidence the coordination of the actinides(V,VI) with TcO 4 - -anions. That is in agreement with Np(VI) pertechnetate X-ray structural analysis performed on a single crystal.