标题：Syntheses, crystal structure and physical properties of new Zintl phases Ba3T2As4(T=Zn, Cd)
作者：Wang, Jian ;Xia, Sheng-Qing ;Tao, Xu-Tang
作者机构：[Wang, Jian ;Xia, Sheng-Qing ;Tao, Xu-Tang ] State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University, Jinan, Sh 更多
来源：Journal of Solid State Chemistry
摘要：Through high temperature Pb-flux reactions, two new arsenide Zintl compounds, Ba3Zn2As4and Ba3Cd2As4, were successfully obtained and their structures were accurately determined with Single-Crystal X-ray Diffraction. Both compounds are isotypic to Ba3Cd2Sb4and crystallize in the monoclinic space group C2/m (No=12) with cell parameters of a=16.916(4)/17. 089(3) A˚, b=4.497(1)/4.6076(7) A˚, c=7.225(2)/7.304(1) A˚ and β=113.147(2)/112.312(1) ° for Ba3Zn2As4and Ba3Cd2As4, respectively. Electrical resistivity measurement on Ba3Cd2As4reveals semiconducting behavior between 10 and 100 K, which results in a very small band gap of 0.01 eV. According to TG/DSC analyses, Ba3Cd2As4exhibits good thermal stability and does not decompose below 950 K. © 2012 Elsevier Inc.