in neat (no solvent) Kinetics; vapor phase hydrolysis of PuBr3 (prepared from Pu-oxalate and HBr-gas at 550°C) at 728-877 K in a hydrolysis apparatus described in : Weigel, F.; Wishnevsky, V. Gueldner, R., J. Less-Common Met. 75 (1980) 89.;