Assessing structure of Mg3Bi2−xSbx (0 ≤ x ≤ 2) at pressures below 40 GPa

Dong, Weiwei; Xu, Wei; Guo, Zhiying; Liu, Weishu; Pan, Yu; Kulkarni, Satishkumar; Li, Xiaodong; Glazyrin, Konstantin

doi:10.1016/j.jmat.2023.10.004

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Assessing structure of Mg₃Bi_2−xSbx (0 ≤ x ≤ 2) at pressures below 40 GPa

MPS-Authors

/persons/resource/persons230813

Pan, Yu
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Dong, W., Xu, W., Guo, Z., Liu, W., Pan, Y., Kulkarni, S., et al. (2024). Assessing structure of Mg₃Bi_2−xSbx (0 ≤ x ≤ 2) at pressures below 40 GPa. Journal of materiomics, 10(4), 837-844. doi:10.1016/j.jmat.2023.10.004.

Cite as: https://hdl.handle.net/21.11116/0000-000E-9E3B-F

Abstract

Mg3Bi2–xSbx (0 ≤ x ≤ 2) have gained significant attention due to their potential in thermoelectric (TE) applications. However, there has been much debating regarding their structural properties and phase diagram as a function of pressure, which is crucial for understanding of their TE properties. Here, we investigate a unified phase diagram of Mg3(Bi,Sb)2 materials up to 40 GPa at room temperature using high-pressure X-ray diffraction. Two high-pressure phases with the structural transition succession of P3¯m1 → C2/m → P21/n are observed, which is valid for all Mg3Bi2–xSbx (0 ≤ x ≤ 2) compounds. We further explore the low-pressure phase P3¯m1 and report that alloying does not change the quasi-isotropic compression of the unit lattice parameters nor has effect on the anisotropic bond compressibility, as recently reported for the end-members. Our study presents a comprehensive picture of Mg3Bi2–xSbx as a function of pressure and chemical composition providing a solid foundation for the future experimental and theoretical studies searching for the most efficient TE compound in Mg3(Bi,Sb)2. © 2023 The Authors