A total number of N = 2000 water molecules and ions were initially disposed on a simple cubic lattice. The ratio of ions-to-water molecules was set by the salt concentration c s , which was varied from 0 to 5 mol/kg for NaCl solutions, and from 0 to 1.25 mol/kg for Na 2 SO 4 solutions. The system was first relaxed at a temperature T = 20 • C in the NVT ensemble during 50 ps, and then at a pressure P = 1 bar and temperature T = 20 • C in the isotropic NPT ensemble during 250 ps. Finally, production runs in the NPT ensemble were performed for 2 ns, after which all observables are well converged. During the production runs, configurations were saved every 0.05 ps for analysis. Simulation input scripts are available in the DaRUS repository .