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Issue 33, 2018
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The updated Zn–Sb phase diagram. How to make pure Zn13Sb10 (“Zn4Sb3”).

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Abstract

The Zn–Sb system contains two well-known thermoelectric materials, Zn1−δSb and Zn13−δSb10 (“Zn4Sb3”), and two other phases, Zn9−δSb7 and Zn3−δSb2, stable only at high temperatures. The current work presents the updated phases diagram constructed using the high-temperature diffraction studies and elemental analysis. All phases are slightly Zn deficient with respect to their stoichiometric compositions, which is consistent with their p-type charge transport properties. Either at room or elevated temperatures, Zn1−δSb and Zn13−δSb10 display deficiencies of the main Zn sites and partial Zn occupancy of the other interstitial sites. A phase pure Zn13−δSb10 sample can be obtained from the Zn13Sb10 loading composition, and there is no need to use a Zn-richer composition such as Zn4Sb3. While the Zn13−δSb10 phase is stable till its decomposition temperature of 515 °C, it may incorporate some additional Zn around 412 °C, if elemental Zn is present.

Graphical abstract: The updated Zn–Sb phase diagram. How to make pure Zn13Sb10 (“Zn4Sb3”).

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Article information


Submitted
20 Jun 2018
Accepted
30 Jul 2018
First published
02 Aug 2018

Dalton Trans., 2018,47, 11512-11520
Article type
Paper

The updated Zn–Sb phase diagram. How to make pure Zn13Sb10 (“Zn4Sb3”).

C. T. Lo, V. Svitlyk, D. Chernyshov and Y. Mozharivskyj, Dalton Trans., 2018, 47, 11512
DOI: 10.1039/C8DT02521E

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