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Abstract
Electron diffraction has been used to study the formation of a variety of complex superlattices in the IT, 2H and 4Hb polytypes of TaS2 during intercalation with hydrazine gas (N2H4), in situ in the electron microscope. Results are presented over the temperature range 15 K-360 K and are interpreted in terms of scattering from periodic lattice distortions linked to charge density waves. Comparisons are also made with similar effects in both the as-grown crystals and TaS2 samples containing other adducts.