During the remelting reaction, belite crystals with Al/Fe ratio < 1 produced a liquid which formed droplets on the lamellar boundaries; the rate of remelting reaction was very low. Belite crystals with Al/Fe > 1 produced a liquid which readily spread on the lamellae with a resulting high rate of reaction. At 1450 degrees C the distribution coefficient of Al and Fe atoms between the belite and the interstitial liquid ((Al/Fe)(Belite)/(Al/Fe)(Liquid)) was about 0.8.