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The chemical effects of the isomeric transition of ' 5 Tc have been investigated in potassium and ammonium hexachloro-technetate(IV) in solution and solid matrix. The retention of , Tc in sulphuric solution was found to be close to zero. Change of the acid concentration had no effect. Nor was 3 Μ HQ solution much different. The retentions for the solid matrices were found to be higher than 70%. The unretained 9 Tc appeared as cationic, hydrated Tc02, [TcQ5 (H,0)] ' and TcO; species. The last species only amounted to about 1 %.

Chemical Effects of Isomeric Transition of 95m Tc in Inorganic Tc(IV)-Complexes