Pore Structure  MEL
Pore Size(nm)  0.56 - 0.58  
SiO2/Al2O3   15 - 45, 45 - 80, 80 - 150, 150 - 300
BET(m²/g)  >= 350
Relative Crystallinity(%)   >= 95
Na₂O weight(%)  <= 0.1
Loss on Ignition(%)  <= 5 

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All Molecular sieves