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Ionic Mobility, Structure, Phase Transition, and Conductivity in (NH4)3Sb4F15

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Abstract

Fluoride and ammonium ion dynamics in (NH4)3Sb4F15 was studied by 1H and 19F NMR spectroscopy in the range 180-440 K. Types of ionic motion were determined, and their activation energies were estimated. The crystal structure of a single crystal of (NH4)3Sb4F15 (space group \(P\bar 1\)) was solved. In the range ∼\(430 \pm 2\) K, a reversible phase transition has been found. Based on the experimental values of conductivity \(\sigma \) of (NH4)3Sb4F15 (\(\sigma \)\(9 \cdot 10^{ - 3} \) S/cm at T = 440 K), this antimony(III) fluoride is classified as a superionic conductor.

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Kavun, V.Y., Udovenko, A.A., Uvarov, N.F. et al. Ionic Mobility, Structure, Phase Transition, and Conductivity in (NH4)3Sb4F15. Journal of Structural Chemistry 43, 246–251 (2002). https://doi.org/10.1023/A:1019692222548

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