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

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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 0a was calculated: 43 ± 4 kJ mol−1. The standard enthalpy of sublimation δH 0298, subl 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.

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Authors and Affiliations

  1. Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Moscow oblast, Russia

    V. P. Domanov & Yu. V. Lobanov

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  1. V. P. Domanov
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  2. Yu. V. Lobanov
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Original Russian Text © V.P. Domanov, Yu.V. Lobanovev, 2009, published in Radiokhimiya, 2009, Vol. 51, No. 1, pp. 14–16.

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Domanov, V.P., Lobanov, Y.V. Refinement of data on the volatility of octavalent plutonium in the form of tetraoxide PuO4 . Radiochemistry 51, 14–17 (2009). https://doi.org/10.1134/S1066362209010044

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  • DOI: https://doi.org/10.1134/S1066362209010044

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