Changes of medium-range structure in the course of crystallization of zeolite omega from magadiite

• Zeolite omega was synthesized from magadiite in a glycerol–water system.
• Changes of medium-range structure during the crystallization were investigated.
• Formation pathway for zeolite omega is proposed.

Changes of medium-range structure during the crystallization of zeolite omega from magadiite were characterized. It is found that although the long-range order of magadiite is collapsed in the initial stage, parts of 5-member rings and 6-member rings are still preserved as secondary building units. The fraction of 5-member rings and 6-member rings increases as the crystallization progresses. The 4-member ring chains are formed at a stage later than that of 5-member rings and 6-member rings.

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