Stability of new graphite-uranyl-sulfate intercalation compounds was s
tudied experimentally as a function of temperature and concentration.
The action of uranyl-sulfuric acid aqueous solution leads to the forma
tion of two mixed-phase intercalation products: the usual sulfate phas
e (d(i) = 798 pm) and a new uranyl-sulfate phase (d(i) = 855 pm). This
latter phase is obtained alone after desorption of the sulfate phase,
due to the lower thermal stability of the sulfate phase.