AbstractUsing time differential perturbed angular correlation (TDPAC) we investigated the181Ta nuclear quadrupole interaction (NQI) in situ during intercalation of ethylenediamine (EDA) into 1T-TaS2. A non-hexagonal
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 superstructure related to a charge density wave is formed with the phasing onto the lattice being derived from the NQI data. Upon heating to 473 K the Ta metal coordination changes irreversibly from octahedral to trigonal prismatic.

The intercalation of ethylenediamine into 1T-TaS2 leads to a non-hexagonal charge density wave, which changes from octahedral to trigonal prismatic upon heating to 473 K.

The charge density wave in 1T-TaS2 intercalated with ethylenediamine: a combined TDPAC and X-ray study

Key Takeaway: The intercalation of ethylenediamine into 1T-TaS2 leads to a non-hexagonal charge density wave, which changes from octahedral to trigonal prismatic upon heating to 473 K.