Jump to main content
Jump to site search

Issue 4, 2011
Previous Article Next Article

Crystal structures and thermoelectric properties of the series Tl10−xLaxTe6 with 0.2 ≤ x ≤ 1.15

Author affiliations

Abstract

The tellurides Tl10−xLaxTe6 were synthesized from the elements in stoichiometric ratios at 873 K, followed by slow cooling. These materials are substitution variants of Tl5Te3, crystallizing in space groupI4/mcm, with lattice dimensions of a = 8.9220(4) Å, c = 13.156(1) Å, V = 1047.2(1) Å3, for x = 1 (Z = 2). Increasing the La content occurs with an increase in the unit cell volume and the c axis, but a decrease of the a axis. Tl5Te3 is a metallic compound, while Tl9LaTe6 was calculated to be semiconducting. Correspondingly, the Seebeck coefficient increases with increasing x, while the electrical and thermal conductivity both decrease. The highest thermoelectric figure-of-merit determined thus far is 0.21 at 581 K for cold-pressed Tl9LaTe6.

Graphical abstract: Crystal structures and thermoelectric properties of the series Tl10−xLaxTe6 with 0.2 ≤ x ≤ 1.15

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Sep 2010, accepted on 25 Oct 2010 and first published on 10 Dec 2010


Article type: Paper
DOI: 10.1039/C0DT01151G
Citation: Dalton Trans., 2011,40, 862-867
  •   Request permissions

    Crystal structures and thermoelectric properties of the series Tl10−xLaxTe6 with 0.2 ≤ x ≤ 1.15

    S. Bangarigadu-Sanasy, C. Raj Sankar, A. Assoud and H. Kleinke, Dalton Trans., 2011, 40, 862
    DOI: 10.1039/C0DT01151G

Search articles by author

Spotlight

Advertisements