Nuclear Magnetic Resonance Study of Anion and Cation Dynamics in CsSiH3

Published

March 31, 2019

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

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.jallcom.2018.12.162

Local Download

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 CsSiH₃, Journal of Alloys and Compounds, [online], https://doi.org/10.1016/j.jallcom.2018.12.162, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927018 (Accessed March 3, 2025)