Modelling results obtained with MCPlas using the 4-species RKM (reaction kinetic model), option DDAn (improved drift-diffusion approximation) and boundary conditions (10), (11) and (14) from the manuscript. Data contain particle species number densities, mean electron energy and electric in the stationary state of a DC glow discharge in argon . Modelling was carried out for a constant voltage of 350 V, with a gap distance of 1 cm, a gas pressure of 1 Torr and a gas temperature of 300 K.