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Thermodynamic investigation of the systems LnSe2–LnSe1.5 (Ln = La, Nd)

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Abstract

A detailed thermodynamic study of the systems LnSe2–LnSe1.5 (Ln = La, Nd) was performed by static method of vapour pressure measurement using quartz membrane-gauge manometers within the temperature range 713–1,395 K. The p Se–T–x dependences obtained in this study have shown that the phase regions in composition intervals studied consist of discrete phases: LnSe1.95 LnSe1.90, LnSe1.85, LnSe1.80 (Ln = La, Nd). The enthalpies and the entropies for the stepwise dissociation process were calculated from the experimental data. The standard enthalpies of formation and the absolute entropies were estimated for the compounds investigated using literature data.

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Acknowledgements

This study was financially supported by the “Program in Support of Leading Scientific Schools”, project RF NSh no. 636.2008.3.

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Authors and Affiliations

  1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, Ac. Lavrentyev Prospect 3, 630090, Novosibirsk, Russia

    L. N. Zelenina, T. P. Chusova & I. G. Vasilyeva

  2. Novosibirsk State University, Pirogova street 2, 630090, Novosibirsk, Russia

    L. N. Zelenina

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  1. L. N. Zelenina
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  2. T. P. Chusova
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  3. I. G. Vasilyeva
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Correspondence to L. N. Zelenina.

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Zelenina, L.N., Chusova, T.P. & Vasilyeva, I.G. Thermodynamic investigation of the systems LnSe2–LnSe1.5 (Ln = La, Nd). J Therm Anal Calorim 101, 59–62 (2010). https://doi.org/10.1007/s10973-010-0843-4

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  • DOI: https://doi.org/10.1007/s10973-010-0843-4

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