کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1331078 | 978992 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and phase width of new quaternary selenides PbxSn6−xBi2Se9 (x=0–4.36) Synthesis and phase width of new quaternary selenides PbxSn6−xBi2Se9 (x=0–4.36)](/preview/png/1331078.png)
Quaternary chalcogenides PbxSn6−xBi2Se9 (x=0–4.36) were synthesized with solid-state methods; their structures were determined from the X-ray diffraction of single crystals. PbxSn6−xBi2Se9 crystallizes in an orthorhombic space group Cmcm (No. 63); the structure features a three-dimensional framework containing slabs of NaCl-(3 1 1) type that exhibits identical layers containing seven octahedra units, which expand along the direction [0 1 0]. Each slab contains fused rectangular units that are connected to each other with M–Se contacts in a distorted octahedral environment. Calculations of the band structure, measurements of Seebeck coefficient and electrical conductivity confirm that these compounds are n-type semiconductors with small band gaps and large electrical conductivities.
SYNOPSIS TOC New quaternary selenides, PbxSn6−xBi2Se9 (x=0–4.36), were synthesized and their structure consisting layers of seven octahedra wide slabs expanding along the direction [0 1 0].Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 183, Issue 11, November 2010, Pages 2616–2622