Hexafluoro complex of rutherfordium in mixed HF/HNO solutions
Toyoshima, Atsushi; Haba, Hiromitsu*; Tsukada, Kazuaki ; Asai, Masato ; Akiyama, Kazuhiko*; Goto, Shinichi*; Ishii, Yasuo; Nishinaka, Ichiro; Sato, Tetsuya ; Nagame, Yuichiro ; Sato, Wataru*; Tani, Yuki*; Hasegawa, Hiroko*; Matsuo, Keiji*; Saika, Daisuke*; Kitamoto, Yusuke*; Shinohara, Atsushi*; Ito, Maya*; Saito, Junko*; Kudo, Hisaaki*; Yokoyama, Akihiko*; Sakama, Minoru*; Sueki, Keisuke*; Oura, Yasuji*; Nakahara, Hiromichi*; Schdel, M.*; Brchle, W.*; Kratz, J. V.*
Formation of an anionic fluoride-complex of element 104, rutherfordium (Rf) produced in the Cm(O,5n)Rf reaction was studied by an anion-exchange method based on an atom-at-a-time scale. It was found that the hexafluoro complex of Rf, [RfF], was formed in the studied fluoride ion concentrations of 0.0005 - 0.013 M. Formation of [RfF] was significantly different from that of the homologues Zr and Hf, [ZrF] and [HfF]; the evaluated formation constant of [RfF] is at least one-order of magnitude smaller than those of [ZrF] and [HfF].