Fig. 3 | Nature Communications

Fig. 3

From: Chemical bonding origin of the unexpected isotropic physical properties in thermoelectric Mg3Sb2 and related materials

Fig. 3

Lattice thermal expansion and pressure compression. a Relative lattice constants a/a299K and c/c299K 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 αc/αa 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

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