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- W118231175 abstract "A recent inelastic x-ray scattering study [Manley et al., Phys. Rev. B 85, 132301 (2012)] reveals that the phonon dispersion curves of PuO2 is considerably consistent with our previous density functional +$U$ results [Zhang et al., Phys. Rev. B 82, 144110 (2010)]. Here in the present work, using the same computational methods, we further obtain the phonon dispersion curves for alpha-Pu2O3. We find that the Pu-O bonding is weaker in alpha-Pu2O3 than in fluorite PuO2, and subsequently a frequency gap appears between the vibrations of oxygen and plutonium atoms. Based on the phonon dispersion curves and Helmholtz free energies of PuO2 and alpha-Pu2O3, we systematically calculate the reaction energies for the transformations between Pu, PuO2, and alpha-Pu2O3. It is revealed that the thermodynamic equilibrium of the system is dependent on temperature as well as on the chemical environment. High temperature and insufficient oxygen environment are in favor of the formation of alpha-Pu2O3." @default.
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- W118231175 date "2012-08-18" @default.
- W118231175 modified "2023-09-27" @default.
- W118231175 title "Phonon dispersion curves and thermodynamic properties of alpha-Pu2O3" @default.
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