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Cation-exchange behavior of Rf in HNO$$_{3}$$/HF mixed solution, 2

Ishii, Yasuo; Tome, Hayato; Toyoshima, Atsushi; Asai, Masato ; Nishinaka, Ichiro; Tsukada, Kazuaki ; Nagame, Yuichiro; Miyashita, Sunao*; Mori, Tomotaka*; Suganuma, Hideo*; Tashiro, Yuki*; Shinohara, Atsushi*; Sakamaki, Masami*; Goto, Shinichi*; Kudo, Hisaaki*; Haba, Hiromitsu*; Akiyama, Kazuhiko*; Oura, Yasuji*

Chemical properties of rutherfordium (Rf, the element 104) in HNO$$_{3}$$/HF mixed solutions have been investigated using cation-exchange chromatography. Distribution coefficients of Rf on the cation-exchange resin as a function of hydrofluoric-acid and nitric-acid concentrations have been measured precisely, and it was found that the strength of the fluoride complex formation of Rf is much weaker than those of lighter group 4 homologs Zr and Hf. The same result was obtained through the anion-exchange chromatography. These results enabled us to quantitatively account for the fluoride complexation of Rf.

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