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Radiochemistry

, Volume 51, Issue 1, pp 14–17 | Cite as

Refinement of data on the volatility of octavalent plutonium in the form of tetraoxide PuO4

  • V. P. Domanov
  • Yu. V. Lobanov
Article

Abstract

The previous determinations [1–5] of the enthalpy of adsorption of PuO4 on the quartz surface, which was calculated with an error of ±6 kJ mol−1, are insufficiently accurate. Gas thermochromatographic experiments aimed to refine the temperature of PuO4 deposition under definite temperature and gas-dynamic conditions were performed. The carrier gas was an He-O2 mixture (1: 1). From the data obtained, more correct value of −δH a 0 was calculated: 43 ± 4 kJ mol−1. The standard enthalpy of sublimation δH 298, subl 0 of PuO4 was estimated at 35 ± 10 kJ mol−1 using the linear correlation between the enthalpies of adsorption and sublimation of transition metal oxides.

PACS numbers

68.43.-h 

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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • V. P. Domanov
    • 1
  • Yu. V. Lobanov
    • 1
  1. 1.Flerov Laboratory of Nuclear ReactionsJoint Institute for Nuclear ResearchDubna, Moscow oblastRussia

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