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acid activity added addition alcohol alloys amount analysis appears aqueous calculated carbonate Chem chemical Chemistry chloride coefficient complex components composition compound concentration conductivity constant containing corresponding crystallisation crystals curve decomposition decrease Dependence described determined diagram dissolved distribution effect electrical equilibrium erbium ether eutectic excess experimental experiments extraction formation formed given gives groups heating hydrogen hydroxide increase indicates initial INORGANIC ions isotherm Khim layer lead liquid material measured melting metal method mixture mole molecules Nauk Neorg nitrate observed obtained organic oxide phase platinum precipitate prepared presence pressure quantity ratio reaction Received Russian salt separation shown shows sodium solid solid solutions solubility solution specimens stability structure studied Table temperature ternary thermal tion values vapour various volume weight yield Zhur