Synthesis and Crystal Structure of Zinc Iodide in the Sodalite Cavities of Zeolite A (LTA). -K 6 Zn 3 (KI) 3 (ZnI 2 ) 0.5 [Si 12 Al 12 O 48 ]-LTA (LTA: zeolite A) is synthesized from a single crystal of Zn6[Si12Al12O48]-LTA (prepared by dynamic ion-exchange of Na12[Si12Al12O48]-LTA with aqueous Zn (NO3)2) placed in a stream of flowing KI in MeOH at 294 K for 4 d. Its structure is determined by single crystal XRD. The material crystallizes in the cubic space group Pm3m. Half a Zn 2+ ion and one Iion per unit cell exist in the sodalite cavities, indicating the formation of a ZnI 2 molecule in 50% of the sodalite cavities. The ZnI2 molecules in the sodalite cavities are probably highly resistant to heating and dehydration because they are stabilized by interactions with the framework atoms. Zeolites containing ZnI2 clusters in their unique-sized and regular three-dimensionally oriented cavities are predicted to be advanced catalytic and optical materials. -(KIM, S. H.; PARK*, M.; SON, Y. J.; LEE, H. J.; JEONG, G. C.; BAE, M. N.; LIM, W. T.; Bull. Korean Chem.

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