FCC Catalysts 91 24.24 24.28 24.32 24.36 Unit Cell Size, A 6.0 5.5 > s t 1 5.0 «*> o 4.5 4.0 24.20 24.24 24.28 24.32 24.36 Unit Cell Size, A Figure 3-4. Effects of unit cell size on octane and C 3-gas make [4].