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. 2018 Nov 9;9:4717. doi: 10.1038/s41467-018-07074-4

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© The Author(s) 2018

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. 2 — Single crystal X-ray diffraction pattern of ι–N₂ at 56 GPa. The data were collected over a 56° scan range upon quenching the sample to ambient temperature. Squares mark nitrogen reflections with the given hkl indices. Diamond reflections are labelled with the letter D. Indices are not shown on the lower half of the image plate to clearly display the quality of the raw data