Effect of Annealing on Structural and Thermodynamic Properties of ThSiO4-ErPO4 Xenotime Solid Solution - Université de Lyon Access content directly
Journal Articles Inorganic Chemistry Year : 2021

Effect of Annealing on Structural and Thermodynamic Properties of ThSiO4-ErPO4 Xenotime Solid Solution

Abstract

The effect of annealing on structural and thermochemical properties of a thorite-xenotime solid solution Th1–xErx(SiO4)1–x(PO4)x was assessed. The samples synthesized at low temperatures and stored at room temperature for 2 years retained their tetragonal structures. This structure was also maintained after heating to 1100 °C. During annealing, the structure lost water and exsolved some thorianite phases. The thermodynamic parameters did not change much after annealing, suggesting that xenotime was not a low-temperature metastable phase but rather a stable structure able to withstand elevated temperatures regardless of the thorium content. The solid solution exhibited subregular behavior with the Margules function W(x) = (73.1 ± 20.1) – (125.7 ± 49.8)·x.
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Dates and versions

hal-03343982 , version 1 (19-10-2021)

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A. Shelyug, M. Rafiuddin, Adel Mesbah, Nicolas Clavier, Stephanie Szenknect, et al.. Effect of Annealing on Structural and Thermodynamic Properties of ThSiO4-ErPO4 Xenotime Solid Solution. Inorganic Chemistry, 2021, 60 (16), pp.12020-12028. ⟨10.1021/acs.inorgchem.1c01137⟩. ⟨hal-03343982⟩
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