Chemical Twinning of Salt and Metal in the Subnitridometalates Ba23Na11(MN4)4 with M=V, Nb, Ta

详细信息    查看全文

• 作者：Matthias Wö ; rsching ; Frank Tambornino ; Stefan Datz and Dr. Constantin Hoch
• 刊名：Angewandte Chemie International Edition
• 出版年：2016
• 出版时间：August 26, 2016
• 年：2016
• 卷：55
• 期：36
• 页码：10868-10871
• 全文大小：1113K
• ISSN：1521-3773

文摘

The subnitridometalates Ba₂₃Na₁₁(MN₄)₄ (M=V, Nb, Ta) crystallize in a new structure type, which shows ionic ortho-nitridometalate anions and motifs from simple (inter)metallic packings: Na-centered [Na₈] cubes as cutouts of the bcc structure of elemental Na and Na-centered [Ba₁₀Na₂] icosahedra as found in Laves phases, for example. Single-crystal and powder X-ray diffraction studies in combination with quantum-chemical calculations of the electronic structure and Raman spectroscopy support the characterization of the subnitridometalates as “chemical twins”. They consist of independent building units with locally prevalent ionic or metallic bonding in an overall metallic compound.