A NEW STRUCTURAL TYPE IN TERNARY CHALCOGENIDE CHEMISTRY - STRUCTURE AND PROPERTIES OF NB2PD3SE8
A NEW STRUCTURAL TYPE IN TERNARY CHALCOGENIDE CHEMISTRY - STRUCTURE AND PROPERTIES OF NB2PD3SE8
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DOI：
10.1016/0022-4596(84)90200-7
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发表时间：
1984-01-01
影响因子：
3.3
通讯作者：
IBERS, JA
中科院分区：
文献类型：
--
作者：
KESZLER, DA;IBERS, JA
通过对Nb-Pd-Se体系的研究，发现了一种新相Nb_2Pd_3Se_8。该相的结构已通过单晶X射线测量确定。该化合物属于D_（92）h-Pb_（am）空间群，晶胞尺寸为a = 15.074（6），B= 10.573（4），c= 3.547（2）nm。在这个不寻常的结构中，有两个以铌原子为中心的共享边缘的硒三角棱镜链。这些链通过两种类型的钯原子连接-正方形平面和正方形平面-每个由硒原子配位。由于这种连接，隧道沿着裂缝延伸。电导率测量表明这种材料是金属半导体。
A study of the NbPdSe system has afforded a new phase, Nb2Pd3Se8. The structure of this phase has been established through single-crystal X-ray measurements. The compound crystallizes in space groupD92h-Pbamwith two formula units in a cell of dimensionsa= 15.074(6),b= 10.573(4),c= 3.547(2)Å. In this unusual structure there are two chains of edge-sharing selenium trigonal prisms centered by niobium atoms. These chains conjoin through two types of palladium atoms—square planar and square pyramidal—each coordinated by selenium atoms. As a consequence of this conjunction tunnels extending alongcresult. Electrical conductivity measurements indicate that this material is a metallic-semiconductor.