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Title: High temperature thermoelectric properties of the solid-solution zintl phase Eu₁₁Cd 6-xZn xSb₁₂

Abstract

Solid-solution Zintl compounds with the formulaEu₁₁Cd 6-xZn xSb₁₂ have been synthesized from the elements as single crystals using a tin flux according to the stoichiometry Eu:Cd:Zn:Sb:Sn of 11:6–x p:x p:12:30 with x p = 0, 1, 2, 3, 4, 5, and 6, where x p is the preparative amount of Zn employed in the reaction. The crystal structures and the compositions were established by single-crystal as well as powder X-ray diffraction and wavelength-dispersive X-ray analysis measurements. The title solid-solution Zintl compounds crystallize isostructurally in the centrosymmetric monoclinic space group C 2 /m (No. 12, Z = 2) as the Sr₁₁Cd₆Sb₁₂ structure type (Pearson symbol mC58). There is a miscibility gap at 3 ≤ x p ≤ 4 where the major product crystallizes in a disordered structure related to the Ca₉Mn₄Bi₉ structure type; otherwise, for all other compositions, the Sr₁₁Cd₆Sb₁₂ structure is the majority phase. Eu₁₁Cd₆Sb₁₂ shows lower lattice thermal conductivity relative to Eu₁₁Zn₆Sb₁₂ consistent with its higher mean atomic weight, and as anticipated, the solid-solution samples of Eu₁₁Cd 6–xZn xSb₁₂ have effectively reduced lattice thermal conductivities relative to the end member compounds. Eu₁₁̣̣₀ (1)Cd₄̣̣₅ (2)Zn₁̣̣₅ (2)Sb₁₂̣̣₀ (1) exhibits the highest zT value of >0.5 at around 800 K which ismore » twice as large as the end member compounds.« less

Authors:
; ; ; ; ; ;  [1];  [2]
  1. (UCD)
  2. (
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
NASANIHOTHER
OSTI Identifier:
1186924
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemistry of Materials; Journal Volume: 27; Journal Issue: 12
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Kazem, Nasrin, Hurtado, Antonio, Sui, Fan, Ohno, Saneyuki, Zevalkink, Alexandra, Snyder, Jeffrey G., Kauzlarich, Susan M., and CIT). High temperature thermoelectric properties of the solid-solution zintl phase Eu₁₁Cd6-xZnxSb₁₂. United States: N. p., 2015. Web. doi:10.1021/acs.chemmater.5b01301.
Kazem, Nasrin, Hurtado, Antonio, Sui, Fan, Ohno, Saneyuki, Zevalkink, Alexandra, Snyder, Jeffrey G., Kauzlarich, Susan M., & CIT). High temperature thermoelectric properties of the solid-solution zintl phase Eu₁₁Cd6-xZnxSb₁₂. United States. doi:10.1021/acs.chemmater.5b01301.
Kazem, Nasrin, Hurtado, Antonio, Sui, Fan, Ohno, Saneyuki, Zevalkink, Alexandra, Snyder, Jeffrey G., Kauzlarich, Susan M., and CIT). Mon . "High temperature thermoelectric properties of the solid-solution zintl phase Eu₁₁Cd6-xZnxSb₁₂". United States. doi:10.1021/acs.chemmater.5b01301.
@article{osti_1186924,
title = {High temperature thermoelectric properties of the solid-solution zintl phase Eu₁₁Cd6-xZnxSb₁₂},
author = {Kazem, Nasrin and Hurtado, Antonio and Sui, Fan and Ohno, Saneyuki and Zevalkink, Alexandra and Snyder, Jeffrey G. and Kauzlarich, Susan M. and CIT)},
abstractNote = {Solid-solution Zintl compounds with the formulaEu₁₁Cd6-xZnxSb₁₂ have been synthesized from the elements as single crystals using a tin flux according to the stoichiometry Eu:Cd:Zn:Sb:Sn of 11:6–xp:xp:12:30 with xp = 0, 1, 2, 3, 4, 5, and 6, where xp is the preparative amount of Zn employed in the reaction. The crystal structures and the compositions were established by single-crystal as well as powder X-ray diffraction and wavelength-dispersive X-ray analysis measurements. The title solid-solution Zintl compounds crystallize isostructurally in the centrosymmetric monoclinic space group C 2/m (No. 12, Z = 2) as the Sr₁₁Cd₆Sb₁₂ structure type (Pearson symbol mC58). There is a miscibility gap at 3 ≤ xp ≤ 4 where the major product crystallizes in a disordered structure related to the Ca₉Mn₄Bi₉ structure type; otherwise, for all other compositions, the Sr₁₁Cd₆Sb₁₂ structure is the majority phase. Eu₁₁Cd₆Sb₁₂ shows lower lattice thermal conductivity relative to Eu₁₁Zn₆Sb₁₂ consistent with its higher mean atomic weight, and as anticipated, the solid-solution samples of Eu₁₁Cd6–xZnxSb₁₂ have effectively reduced lattice thermal conductivities relative to the end member compounds. Eu₁₁̣̣₀(1)Cd₄̣̣₅(2)Zn₁̣̣₅(2)Sb₁₂̣̣₀(1) exhibits the highest zT value of >0.5 at around 800 K which is twice as large as the end member compounds.},
doi = {10.1021/acs.chemmater.5b01301},
journal = {Chemistry of Materials},
number = 12,
volume = 27,
place = {United States},
year = {Mon Aug 24 00:00:00 EDT 2015},
month = {Mon Aug 24 00:00:00 EDT 2015}
}