Size-dependent convergence of the Mg:Si ratio for pyroxenic (top) and olivinic (bottom) grain compositions, grown at 600 K and 1100 K. For each chemical composition and temperature, the results of three different NAGGS simulations are shown for each composition-temperature combination. The plots show percentage deviations of the Mg:Si ratio relative to the corresponding stoichiometric values (i.e. zero deviation highlighted by dashed lines). The same analysis for the O:Si ratio can be found in D.1.