Abstract
MTS 3 (M = Sn, Pb, La; T = Ti, Nb), rigorously denoted by (MS) 1+ x (TS 2), are misfit layer compounds with nonstoichiometric compositions. We may regard them as intercalation derivatives of layered TS 2 compounds, but also as materials having ultimately-thin one-dimensional superlattices with repeated distances of an atomic scale. The detailed investigation of interlayer interaction has been made, applying a difference technique to the sulfur K and niobium 2 X-ray absorption spectra. It is found that in all cases charge transfer occurs from MS to TS 2 layers, but interlayer interaction depends on the combination of two kinds of alternately-stacked layers. PbNbS 3 and SnNbS 3 have stronger interlayer interaction than PbTiS 3 and LaNbS 3.
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