Indication for a volatile element 114

Eichler, R.; Aksenov, N. V.; Albin, Yu. V.; Belozerov, A. V.; Bozhikov, G. A.; Chepigin, V. I.; Dmitriev, S. N.; Dressler, R.; Gäggeler, H. W.; Gorshkov, V. A.; Henderson, G.S.; Johnsen, A. M.; Kenneally, J. M.; Lebedev, V. Ya.; Malyshev, O. N.; Moody, K. J.; Oganessian, Yu. Ts.; Petrushkin, O. V.; Piguet, D.; Popeko, A. G.; ... (2010). Indication for a volatile element 114. Radiochimica acta, 98(3), pp. 133-139. Oldenbourg 10.1524/ract.2010.1705

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Recently, the chemical investigation of element 112 revealed a highly volatile, noble metallic behaviour, as expected for the last group 12 member of the periodic table. The observed volatility and chemical inertness were ascribed to the growing influence of relativistic effects on the chemical properties of the heaviest elements with increasing nuclear charge. Here, we report for the first time on gas phase chemical experiments aiming at a determination of element 114 properties. This element was investigated using its isotopes 287-114 and 288-114 produced in the nuclear fusion reactions of 48Ca with 242Pu and 244Pu, respectively. Identification of three atoms of element 114 in thermochromatography experiments and their deposition pattern on a gold surface indicates that this element is at least as volatile as simultaneously investigated elements Hg, At, and element 112. This behaviour is rather unexpected for a typical metal of group 14.

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