Heterogeneous equilibriums in aqueous solutions of uranogermanates with general formula AIHGeUO6•nH2O (AI - Li, Na, K, Rb, Cs, NH4) are investigated in the pH scale range from 0 to 14. Acid-base boundaries of existence of the compounds in aqueous solutions are found and the products of their conversion and solubility are determined. Equilibrium constants for heterogeneous reactions and ?Gf for AIHGeUO6•nH2O are calculated. The solubility curves and the speciation diagrams of U (VI) and Ge (IV) in aqueous solutions and bottom solid phases are presented.
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