On systems of vaporous polonium dioxide-zinc, cadmium and barium oxides

Using the thermal method of the direct synthesis in oxygen medium and radiometrically it has been established that vaporous polonium dioxide does not interact with zinc and cadmium oxides during their heating up to 1050 deg C. Using the method of the direct synthesis in oxygen medium and radiotensimetric method it is shown that barium oxides at 900 and 950 deg C absorb polonium dioxide to the mole ratio of polonium dioxide-barium oxide (0.71-0.77)+-0.15 and (1.04-1.25)+-0.25 respectively with the formation of Ba4Po3O10 and BaPoO3. During heating in oxygen medium up to 1000 deg C these compounds separate polonium dioxide to the mole ratio of polonium dioxide-barium oxide 0.54+-0.11 with the formation of Ba2PoO4. Temperature dependences of vapour pressure of polonium dioxide in the process of dissociation of the compounds prepared are determined and the heats of the processes are calculated