Full metadata record
DC FieldValueLanguage
dc.contributor.authorSMITH ANNAen_GB
dc.contributor.authorCOLLE JEAN-YVESen_GB
dc.contributor.authorBENES ONDREJen_GB
dc.contributor.authorKONINGS RUDYen_GB
dc.contributor.authorSUNDMAN B.en_GB
dc.contributor.authorGUENEAU CHRISTINEen_GB
dc.date.accessioned2018-08-16T00:22:26Z-
dc.date.available2018-08-14en_GB
dc.date.available2018-08-16T00:22:26Z-
dc.date.created2018-08-08en_GB
dc.date.issued2016en_GB
dc.date.submitted2016-04-21en_GB
dc.identifier.citationJOURNAL OF CHEMICAL THERMODYNAMICS vol. 103 p. 257-275en_GB
dc.identifier.issn0021-9614en_GB
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0021961416301860?via%3Dihuben_GB
dc.identifier.urihttp://publications.jrc.ec.europa.eu/repository/handle/JRC101367-
dc.description.abstractKnudsen effusion mass spectrometry measurements on neptunium dioxide are reported in this work, which have allowed to improve the understanding of its vaporization behaviour and solved discrepancies noticed in the literature: the enthalpy of formation of NpO2(g) has been re-assessed and the composition of neptunia at congruent vaporization has been determined at 2262 K. In addition, a thermodynamic model for the neptunium-oxygen system has been developed using the CALPHAD method. The non stoichiometric NpO2-x phase is described herein using the compound energy formalism with ionic constituents (Np3+;Np4+)1(O2-; V a)2, while the liquid phase is represented with the ionic two-sublattice model (Np4+)P (O2-; V aQ;O)Q. The reliability and consistency of all optimized Gibbs energies have been verified by calculating the phase equilibria, thermodynamic data, oxygen chemical potential and equilibrium partial pressures. Finally, a number of ill-defined data in the Np-O system have been identified after critical review of the literature and comparison with the present experimental results and CALPHAD model.en_GB
dc.description.sponsorshipJRC.G.I.3-Nuclear Fuel Safetyen_GB
dc.format.mediumOnlineen_GB
dc.languageENGen_GB
dc.publisherACADEMIC PRESS LTD- ELSEVIER SCIENCE LTDen_GB
dc.relation.ispartofseriesJRC101367en_GB
dc.titleThermodynamic assessment of the neptunium-oxygen system: mass spectrometric studies and thermodynamic modellingen_GB
dc.typeArticles in periodicals and booksen_GB
dc.identifier.doi10.1016/j.jct.2016.07.040en_GB
JRC Directorate:Nuclear Safety and Security

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.