Proton conductivity and spectral data of Cs2HPO4 · 2H2O
- Authors: Ponomareva V.G.1,2, Bagryantseva I.N.1,2, Lavrova G.V.1
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Affiliations:
- Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch
- Novosibirsk State University
- Issue: Vol 53, No 6 (2017)
- Pages: 636-640
- Section: Article
- URL: https://journals.rcsi.science/1023-1935/article/view/188783
- DOI: https://doi.org/10.1134/S1023193517060155
- ID: 188783
Cite item
Abstract
The Cs2HPO4 · 2H2O single crystals synthesized from an aqueous solution containing equimolar amounts of H3PO4 and Cs2CO3 were studied by impedance and IR spectroscopy, X-ray diffraction analysis, and differential scanning calorimetry (DSC). The IR spectra were analyzed in accordance with the structural data, and the absorption bands were assigned. The proton conductivity was studied at temperatures in the range 20–250°C. The conductivity of dehydrated Cs2HPO4 was low, ~10–5–10–9 S cm–1 at 90–250°C with an activation energy of conductivity Ea = 1.1 eV at 130–250°C. The processes determining the character of the temperature dependence of conductivity were consistent with the DSC and thermogravimetry data. According to these data, dehydration of the crystalline hydrate Cs2HPO4 · 2H2O starts at 60°C and occurs in three stages, forming Cs2HPO4 · 1.5H2O below 100°C; anhydrous Cs2HPO4 at t > 160°C, which is stable up to 300°C; and Cs4P2O7 above 330°C.
About the authors
V. G. Ponomareva
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch; Novosibirsk State University
Author for correspondence.
Email: ponomareva@solid.nsc.ru
Russian Federation, Novosibirsk, 630128; Novosibirsk, 630090
I. N. Bagryantseva
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch; Novosibirsk State University
Email: ponomareva@solid.nsc.ru
Russian Federation, Novosibirsk, 630128; Novosibirsk, 630090
G. V. Lavrova
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch
Email: ponomareva@solid.nsc.ru
Russian Federation, Novosibirsk, 630128