Answer:
True.
Step-by-step explanation:
In cement chemistry, C3S (tricalcium silicate) and C2S (dicalcium silicate) are two of the main compounds found in cement clinker. C3S has an irregular crystal structure, which means its crystal arrangement is less organized and more random. On the other hand, C2S crystals are comparatively smaller and have a rounder shape, suggesting a more ordered crystal structure than C3S. This difference in crystal structure can influence the reactivity and properties of these compounds during the cement hydration process.