Structure, Magnetism, and Thermoelectric Properties of Magnesium-Containing Antimonide Zintl Phases Sr14MgSb11 and Eu14MgSb11

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• 作者：Wen-jie Tan ; Yin-tu Liu ; Min Zhu ; Tie-jun Zhu ; Xin-bing Zhao ; Xu-tang Tao ; Sheng-qing Xia
• 刊名：Inorganic Chemistry
• 出版年：2017
• 出版时间：February 6, 2017
• 年：2017
• 卷：56
• 期：3
• 页码：1646-1654
• 全文大小：496K
• ISSN：1520-510X

文摘

New Mg-containing antimonide Zintl phases, Sr₁₄MgSb₁₁ and Eu₁₄MgSb₁₁, were synthesized from high-temperature solid-state reactions in Ta tubes at 1323 K. Their structures can be viewed as derived from the Ca₁₄AlSb₁₁ structure type, which adopt the tetragonal space group I4₁/acd (No. 142, Z = 8) with the cell parameters of a = 17.5691(14)/17.3442(11) Å and c = 23.399(4)/22.981(3) Å for the Sr- and Eu-containing compounds, respectively. The corresponding thermoelectric properties were probed, which demonstrated high potential of these compounds as new thermoelectrics for their very low thermal conductivity and moderate Seebeck coefficient. Magnetism studies and theoretical calculations were conducted as well to better understand the structure-and-property correlation of these materials.