Sound velocities in aqueous solutions of uranyl nitrate were measured at 5 K intervals from T = (283.15 to 323.15) K, within the (0.1 to 2.8) mol . kg(-1) concentration range. The sound velocities determined then served to evaluate the isentropic and isothermal compressibilities, the apparent molar compressibilities, the isochoric thermal pressure coefficients, changes of the cubic expansion coefficients with pressure and the heat capacities with volume and these parameters are qualitatively correlated with the changes in the structure of water when uranyl nitrate is dissolved in it. (C) 2011 Elsevier Ltd. All rights reserved.