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— A concept of phase and chemical correspondence in the system matrix material–host rock is suggested for methods of storing radioactive wastes in crustal rocks. This principle allows directional synthesis of certain mineral matrixes. Matrix materials, which are solid solutions of minerals for immobilization of alkaline, alkaline-earth, rare-earth elements that are radionuclides, were experimentally...
Distribution of cations (Na, K, Cs, Sr) between kosnarite solid solutions differing in the framework composition (Ti/Zr, P/Si) and aqueous solutions at 200°C was studied. The energies of mixing of kosnarite solid solutions and specific features of the cation exchange correlate with the crystallochemical factors: framework charge and size ratio of the framework-forming and out-of-framework cations...
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