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Anion-exchange behavior of Db in HF/HNO$$_{3}$$ solution

Kato, Mizuho*; Adachi, Sadia*; Toyoshima, Atsushi*; Tsukada, Kazuaki ; Asai, Masato ; Haba, Hiromitsu*; Yokokita, Takuya*; Komori, Yukiko*; Shigekawa, Yudai*; Sueki, Keisuke*

A few studies have been so far performed on aqueous chemistry of Db, the group-5 superheavy element, by anion-exchange experiments in HF and HF/HNO$$_{3}$$ mixture solutions. Although the distribution coefficient (Kd) of Db was shown to trend to Ta $$>$$ Nb $$>$$ Db $$>$$ Pa in the group-5 homologs and pseudo-homolog elements, its chemical species has not been clarified. In this work, for identification of fluoride species of Db, we performed anion-exchange experiments of Nb, Ta, and Db in HF/1.0 M HNO$$_{3}$$ mixture solutions by using an automated rapid chemistry apparatus, ARCA.



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