Synthesis, structure, and properties of compounds in the NaHSO4-CsHSO4 system. 2. The absence of superprotonic transitions in Cs2Na(HSO4)3 and CsNa2(HSO4)3

C. R I Chisholm, L. A. Cowan, S. M. Haile*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


Exploratory synthesis in the NaHSO4-CsHSO4 system, aimed at discovering novel protonconducting solids, yielded the new compounds CsNa2(HSO4)3 and Cs2Na(HSO4)3. Thermal analysis demonstrated the absence of phase transitions for both compounds prior to melting. The conductivities of the two compounds vary monotonically with temperature, in a nonArrhenius manner, from ambient to the respective melt temperatures of 398 and 413 K. At 363 K the conductivities are on the order of 10-8 Ω1-cm-1, which is comparable to that of other alkali acid sulfates. The absence of transitions to disordered, high conductivity phases, as is observed in compounds such as CsHSO4, is explained in terms of the stiffness of the Na-O bonds, which may serve to prevent rapid reorientation of SO4 tetrahedral groups.

Original languageEnglish (US)
Pages (from-to)2909-2912
Number of pages4
JournalChemistry of Materials
Issue number9
StatePublished - Dec 18 2001

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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