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Structural and transport properties of compounds in the CsHSO4-KH2PO4 system with a high potassium dihydrophosphate content

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Abstract

The (1−x)CsHSO4-xKH2PO4 system was studied in a wide range of compositions (x = 0.05−0.97). Mixed salts with different crystal structures and different transport, thermodynamic, and thermal properties were shown to form. In these mixed (1−x)CsHSO4-xKH2PO4 compounds (x = 0.05−0.5), solid solutions formed on the basis of the compound with a crystal structure Cs3(HSO4)2(H2PO4) (C2/c). As the content of KH2PO4 increased further, another compound with a crystal structure, CsH5(PO4)2 (P21/c), formed and existed up to x = 0.95. At x ≥ 0.7, KH2PO4 existed as an individual phase along with CsH5(PO4)2; its content increased considerably at x ≥ 0.9. The low conductivities and high activation energies of (1−x)CsHSO4-xKH2PO4 at x = 0.6−0.95 were close to those for CsH5(PO4)2. The compounds with x = 0.5–0.9 showed low thermal stability corresponding to the individual CsH5(PO4)2 phase.

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Authors and Affiliations

  1. Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

    I. N. Bagryantseva & V. G. Ponomareva

  2. Institute of High-Temperature Electrochemistry, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia

    L. A. Dunyushkina

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  1. I. N. Bagryantseva
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  2. L. A. Dunyushkina
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  3. V. G. Ponomareva
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Correspondence to V. G. Ponomareva.

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Original Russian Text © I.N. Bagryantseva, L.A. Dunyushkina, V.G. Ponomareva, 2013, published in Elektrokhimiya, 2013, Vol. 49, No. 1, pp. 57–63.

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Bagryantseva, I.N., Dunyushkina, L.A. & Ponomareva, V.G. Structural and transport properties of compounds in the CsHSO4-KH2PO4 system with a high potassium dihydrophosphate content. Russ J Electrochem 49, 52–58 (2013). https://doi.org/10.1134/S1023193513010047

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  • DOI: https://doi.org/10.1134/S1023193513010047

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