P. Ganal, T. Butz, M. Evain
Mar 1, 1993
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 % MathType!MTEF!2!1!+-% feaafiart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn% hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr% 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9% vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x% fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaaOaaaeaaca% aI3aaaleqaaOGaey41aq7aaOaaaeaacaaI3aaaleqaaaaa!39C6! $$\sqrt 7 \times \sqrt 7 $$ 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.