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. 2018 Nov 9;9:4716. doi: 10.1038/s41467-018-06980-x

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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. 3 — Lattice thermal expansion and pressure compression. a Relative lattice constants a/a_299K and c/c_299K of Mg₃Sb₂ as a function of temperature. The data are obtained from Rietveld refinement of the multi-temperature synchrotron PXRD. b Anisotropic ratio of the linear thermal expansion coefficient α_c/α_a in Mg₃Sb₂ compared to those of several typical layered materials, that is, TiS₂³², MoSe₂³³, MoS₂³³, and Bi₂Te₃³⁴. c, d The calculated pressure dependence of (c) the relative lattice parameters and (d) the relative interlayer distance of Mg₃Sb₂ in comparison with those of several typical layered metal dichalcogenides. The data of SnS₂ are adapted from the reported experimental work²⁷