A SN-119 SOLID-STATE NUCLEAR-MAGNETIC-RESONANCE STUDY OF CRYSTALLINE TIN SULFIDES

Non-spinning and magic angle spinning (MAS) Sn-119 nuclear magnetic re sonance (NMR) spectra of the binary tin sulphides SnS and SnS2 as well as of a number of stoichiometric compounds from the ternary system Na 2S-SnS2 have been recorded. The isotropic chemical shift was found to cover a range of more than 800 ppm and allows us to distinguish betwee n different coordination numbers of Sn(IV) present in tin sulphides. M oreover, the chemical shift anisotropy (c.s.a.) is shown to be a sensi tive indicator for deformations in the coordination sphere of the tin atom and can be discussed with respect to the known structures of the compounds.