Yurtseven, H.Kurt, M.2025-01-272025-01-2720160217-98491793-6640https://doi.org/10.1142/S0217984916500160https://hdl.handle.net/20.500.12428/23779Analysis of the peak position and the linewidths of various infrared modes is performed at high (300-850 K) and low (1.5-300 K) temperatures using the experimental data from the literature for LiKSO4 which exhibits a sequence of phase transitions. The temperature dependences of the frequency and the linewidth which are derived from the anharmonic self-energy are fitted to the observed peak positions and the linewidths of the S-O stretching modes (internal nu(3) modes at 1135 cm(-1) and at 1180 cm(-1)), peak position of the S-O bending nu(4) (internal) modes, the peak position and the linewidth of the Li mode at 429 cm(-1) (external mode), and of the infrared band at 363 cm(-1) for LiKSO4. Our calculated peak positions and the linewidths, which are in good agreement with the observed data show that the anharmonic self-energy model describes adequately the observed behavior of the successive phase transitions in LiKSO4.eninfo:eu-repo/semantics/closedAccessPeak positionlinewidthinfrared modesLiKSO4Article30510.1142/S0217984916500160Q4WOS:0003710652000022-s2.0-84959315563Q2