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Nuclear Magnetic Resonance Study of Anion and Cation Dynamics in CsSiH3

Published

Author(s)

R. V. Skoryunov, O. A. Babanova, A. V. Soloninin, A. V. Skripov, J.-N. Chotard, R. Janot, W. S. Tang, Mirjana NMN Dimitrievska, Terrence J. Udovic

Abstract

In order to study the dynamical properties of cesium silanide CsSiH3, we have measured the 1H and 133Cs nuclear magnetic resonance (NMR) spectra and spin-lattice relaxation rates in this compound over the temperature range of 5 K to 354 K. The results of the 1H NMR measurements indicate that [SiH3]- anions in CsSiH3 retain unusually high reorientational mobility down to low temperatures. In particular, a significant narrowing of the proton NMR spectrum due to [SiH3]- reorientations is observed in the range of 10 K to 14 K. The order-disorder (βarrow}α) phase transition accompanied by the strong acceleration of [SiH3]- reorientations is found to be 41(4) meV. The 133Cs NMR results are consistent with the onset of diffusive motion of Cs+ cations at the frequency scale of approximately equal to} 104s-1 above 300 K.
Citation
Journal of Alloys and Compounds
Volume
781

Keywords

anion reorientations, cation mobility, cesium silanide, diffusion, energy storage materials, nuclear magnetic resonance

Citation

Skoryunov, R. , Babanova, O. , Soloninin, A. , Skripov, A. , Chotard, J. , Janot, R. , Tang, W. , Dimitrievska, M. and Udovic, T. (2019), Nuclear Magnetic Resonance Study of Anion and Cation Dynamics in CsSiH<sub>3</sub>, Journal of Alloys and Compounds, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927018 (Accessed March 2, 2024)
Created March 31, 2019, Updated October 12, 2021