Visser, D.Monteith, A. R.Ronnow, H. R.Maaskant, W. J. A.2007-01-242007-01-242007-01-24200010.1016/S0921-4526(99)01492-1https://infoscience.epfl.ch/handle/20.500.14299/239916The acoustic phonon dispersion curves of the hexagonal perovskite CsNiCl3 were measured at room temperature in the vicinity of the Gamma-point along the [0 0 1] and [1 1 0] directions. The derived velocity of sound values for the longitudinal and transverse acoustic phonons are compared with the velocity of sound values from ultrasound and Brillouin scattering measurements as well as model calculations using the GULP code.one-dimensional systemsphonon dispersiontriangular systemstext::journal::journal article::research article