SEARCH Articles Figures Tables 14-membered ring structures 18-membered ring structures, large pore zeolite Large rings structure Large structures Pore structure Pore structure, zeolites Ring silicates Ring structures Ring structures 5- membered rings Ring, large Silicates 12-membered ring structures Silicates ring structures Silicates zeolites Siliceous zeolites Zeolite 12-membered ring Zeolite large-pore Zeolite pores Zeolite rings Zeolites structure