Thermochromatography of Heavy Actinides - Determination of the Sublimation Enthalpy of Es

Autor:	St. Taut, I. Zvara, Matthias Schädel, Bernd Eichler, Heinz W. Gäggeler, S. Hübener
Jazyk:	angličtina
Rok vydání:	2017
Předmět:	Chemistry 540 Chemistry Enthalpy 570 Life sciences biology Physical chemistry Thermodynamics Sublimation (phase transition) Actinide Physical and Theoretical Chemistry
Zdroj:	Radiochimica Acta 78, 33-38 (1997) Taut, Steffen; Hübener, S.; Eichler, B.; Gäggeler, H. W.; Schädel, Μ.; Zvara, I. (1997). Thermochromatography of Heavy Actinides-Determination of the Sublimation Enthalpy of Es. Radiochimica acta, 78(S1), pp. 33-38. Oldenbourg 10.1524/ract.1997.78.special-issue.33
Popis:	The adsorption of Cf, Es, and Fm on several metals was studied thermochromatographically. In all systems investigated Es is adsorbed between the Cf and Fm, due to the increasing metallic divalency in the second half of the actinide series. Based on the adsorption data and the experimentally proved correlation between adsorption and sublimation heats we calculated the Es sublimation enthalpy of 167 kj/mol. This is significantly higher than the value obtained by direct vapour pressure measurements (133 kJ/mol [1]). However, this value fits better to theory.
Databáze:	OpenAIRE
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