X-ray photoelectron investigation of UO2(ClO4)2 interaction with diabase

X-ray diffraction study was made on interaction of soluble uranyl perchlorate with diabase, composing rocks in regions of Chelyabinsk and Chernobyl accidents and in places of radioactive waste burials. Absence of ClO4- anion in analyzed products of UO2(ClO4)2 interaction with diabase testifies to the absence of physio- or chemosorbed UO2(ClO4)2 layer on its surface. Formation of uranyl compounds (uranyl hydroxides) on diabase surface was confirmed, and bond lengths for these compounds were determined. Reaction of substitution of uranium ions for calcium ions proceeds more actively in the surface layers of diabase grains. 4 refs.; 3 tabs