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Enthalpy of Formation of MgAl2O4 · 0.793Al2O3 Nonstoichiometric Spinel at 1900 K from High-Temperature Mass Spectrometry Data

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Inorganic Materials Aims and scope

Abstract

The composition and partial pressures of vapor species over the pseudobinary system Al2O3–MgO have been determined by high-temperature mass spectrometry. The data obtained have been used to evaluate the standard enthalpy of formation of nonstoichiometric spinel with the composition MgAl2O4 · 0.793Al2O3 from its constituent oxides by third-law calculations. The entropy of MgAl2O4 · 0.793Al2O3 has been evaluated using a regular-solution model with allowance for cation inversion.

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Authors and Affiliations

  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia

    N. A. Gribchenkova, K. G. Smorchkov & A. S. Alikhanyan

  2. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia

    A. G. Kolmakov

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  1. N. A. Gribchenkova
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  2. K. G. Smorchkov
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  3. A. G. Kolmakov
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  4. A. S. Alikhanyan
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Correspondence to N. A. Gribchenkova.

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Original Russian Text © N.A. Gribchenkova, K.G. Smorchkov, A.G. Kolmakov, A.S. Alikhanyan, 2018, published in Neorganicheskie Materialy, 2018, Vol. 54, No. 6, pp. 605–610.

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Gribchenkova, N.A., Smorchkov, K.G., Kolmakov, A.G. et al. Enthalpy of Formation of MgAl2O4 · 0.793Al2O3 Nonstoichiometric Spinel at 1900 K from High-Temperature Mass Spectrometry Data. Inorg Mater 54, 575–580 (2018). https://doi.org/10.1134/S0020168518060043

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  • DOI: https://doi.org/10.1134/S0020168518060043

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