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. 2020 Sep 8;11:4492. doi: 10.1038/s41467-020-17951-6

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — a Variable-temperature (VT) wideline ⁷Li NMR spectra recorded between 133 and 373 K for type I (left) and type II (right) Li₃N nanofibres. 1 and 2 denote satellite bands for the two-coordinate Li(1) site and three-coordinate Li(2) site, respectively; b temperature variation of the linewidth of the Li(2) satellites for type I (magenta) and II (blue) Li₃N nanofibres and bulk Li₃N (red)²⁸ extracted from the VT NMR by fitting a simulated powder lineshape.