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119Sn Solid-State NMR of Tin Sulfides. Evidence of Polytypism in SnS2

✍ Scribed by Tanja Pietrass; Francis Taulelle

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
219 KB
Volume
35
Category
Article
ISSN
0749-1581

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✦ Synopsis

The 119Sn magic angle spinning NMR spectra of the three tin sulÐdes SnS, and are discussed with SnS 2 Sn 2 S 3 respect to results from x-ray structure analysis. The distortion from an octahedral environment of tin in SnS and Sn(II) in is reÑected in the large chemical shift anisotropy. The denser coordination sphere of Sn(IV) in Sn 2 S 3 SnS 2 in comparison with is reÑected in the upÐeld shift observed for With the same argument, the shift of Sn 2 S 3 SnS 2 . Sn(II) in the sulÐdes under study is generally much lower than that of Sn(IV). The 119Sn high-resolution solid-state NMR signal of displays a Ðne structure which is assigned to di †erent polytypic regions in the crystallites. SnS 2

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