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Баранов, В. Г.; Godin, Yu. G.; Ivanova, N. A.; Андрианов, А. А.

doi:10.1023/a:1026301919495

Cited by 1 publication

(1 citation statement)

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“…Experimental studies of uraniaceria solid solutions can be broadly divided into two classes. The first is focused on equilibrium thermophysical properties, and include measurements of phase equilibria, [1][2][3] partial molar enthalpies and free energies of oxidation, [4][5][6] and heat capacities. 7,8 The second is focused on the characterization of the atomic and electronic structure of urania-ceria solid solutions, and include measurements of magnetic susceptibilities, [9][10][11] electron paramagnetic resonance, 12 extended X-ray adsorption fine-structure spectroscopy, 13,14 X-ray photoemission spectroscopy (XPS) 15 and X-ray adsorption near-edge spectroscopy (XANES).…”

Section: Introductionmentioning

confidence: 99%

Energetics of cation mixing in urania–ceria solid solutions with stoichiometric oxygen concentrations

Hanken

Shvareva

Grønbech‐Jensen

et al. 2012

Phys. Chem. Chem. Phys.

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Cation mixing energetics in urania-ceria solid solutions with stoichiometric oxygen concentrations (U(1-y)Ce(y)O(2)) have been measured by high-temperature oxide-melt drop-solution calorimetry. Measurements have been performed on eight samples with compositions spanning y = 0.119 to y = 0.815. The measured mixing enthalpies (ΔH(mix)) range from -0.6 ± 3.3 to 3.9 ± 3.0 kJ mol(-1). These values are discussed in the context of results from atomistic modeling which take into consideration the possibility of charge transfer between uranium and cerium cations to form solid solutions with mixed charge states. A comparison between measured and calculated results for ΔH(mix) suggests that such charge transfer takes place to a limited extent in the most concentrated mixtures studied.

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