14-membered ring structures, large pore zeolite silicates

This paper reports the synthesis and characterization of a new family of indium silicate microporous materials, designated InSi-n. The InSi-n phases have been synthesized with 11 novel framework topologies and contain In/Si ratios of 0.25-1. Most InSi-n phases are stable to calcination to at least 500 °C and show adsorption behavior that is zeolitic in character. Ion exchange behavior similar to zeolites has also been observed in InSi-n materials. Preliminary structural details include a crystal structure determination of a new topology with 8-ring channels and HREM evidence for large pores in members of the InSi-n family. 

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