报告题目(中文)：新型As,Sb,Bi与d-金属体系Zintl相

报告题目(英文)：Novel Zintl phases of As, Sb and Bi with the d-metals

报告人姓名：Svilen Bobev

报告人简介：Professor ,University of Delaware, USA

报告人单位(中文)：美国德拉华大学

报告人单位(英文)：University of Delaware, USA

报告时间：2016-06-03 10:00

报告地点：上大宝山校区材料楼526会议室

报告内容简介：The crystal chemistry of the intermetallic compounds containing metals with different electronegativities presents a combination of diverse and complicated bonding patterns and unique metal-metal interactions. As part of an ongoing effort to better understand the structure-property relationships in such intermetallics containing d- and/or f-elements, we focused our attention on the ternary systems A–M–As, A–M–Sb and A–M–Bi (A = alkali or alkaline-earth metals, M = Mn, Zn, Cd). Recent experimental work carried out by our group led to the discovery of several new classes of transition metal based compounds. Common threads in the structures of all of these are the M-centered tetrahedra of As, Sb or Bi, respectively, which are interconnected through shared corners or edges to form chains, ribbons, or layers with complex topologies. These systems present a case where a strikingly delicate balance between the packing efficiency (size effects) and the valence electron concentration (electronic effects) governs the stability of a particular arrangement over another. The structural relationship between these and some well-known structures with two-dimensional layers or three-dimensional four-connected nets will be discussed as well.