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Standard thermodynamic properties of Ag3Sb and Ag6Sb evaluated by EMF measurements

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Abstract

The standard thermodynamic properties of the intermetallic compounds Ag3Sb and Ag6Sb (the minerals dyscrasite and allargentum, respectively) in the Ag-Sb system have been determined in the temperature range 350–500 K at atmospheric pressure using a solid-state galvanic cell (emf method). The results have been used to propose recommended standard thermodynamic functions of formation at 298.15 K and 105 Pa. The Gibbs energy, entropy, and enthalpy of Ag3Sb(cr) are −5934 ± 1277 J/mol, 195.89 ± 2.54 J/(mol K), and 841 ± 1046 J/mol, respectively, and those of Ag6Sb(cr) are −6637 ± 3064 J/mol, 332.40 ± 5.99 J/(mol K), and 2778 ± 2491 J/mol, respectively.

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  1. Institute of Experimental Mineralogy, Russian Academy of Sciences, ul. Akademika Osip’yana 4, Chernogolovka, Noginskii raion, Moscow oblast, 142432, Russia

    M. V. Voronin & E. G. Osadchii

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  1. M. V. Voronin
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  2. E. G. Osadchii
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Correspondence to M. V. Voronin.

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Original Russian Text © M.V. Voronin, E.G. Osadchii, 2013, published in Neorganicheskie Materialy, 2013, Vol. 49, No. 6, pp. 585–589.

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Voronin, M.V., Osadchii, E.G. Standard thermodynamic properties of Ag3Sb and Ag6Sb evaluated by EMF measurements. Inorg Mater 49, 550–554 (2013). https://doi.org/10.1134/S0020168513060186

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