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http://dx.doi.org/10.22807/KJMP.2022.35.4.447

Synthesis and Structural Study of Extraframework ZrI6Tl119+ Cationic Cluster in Zeolite A  

Hyeon Seung, Lim (Department of Applied Chemistry, Andong National University)
Jong Sam, Park (Department of Radiologic Technology, Daegu Health College)
Cheol Woong, Kim (Korea Institute for Water Technology Certification)
Woo Taik, Lim (Department of Applied Chemistry, Andong National University)
Publication Information
Korean Journal of Mineralogy and Petrology / v.35, no.4, 2022 , pp. 447-455 More about this Journal
Abstract
Fully dehydrated Tl12-LTA (|Tl12|[Si12Al12O48]-LTA,Tl12-A) was treated with 6.0×103 Pa of ZrI4 (g) at 623 K for 72 hr under anhydrous conditions. The crystal structure of product, |Zr0.25I1.5Tl12|[Si12Al12O48]-LTA, was determined by single-crystal crystallography using synchrotron X-radiation in the cubic space group Pm3m (a = 12.337(2) Å). It was refined using all data to the final error index (for the 712 unique reflections for which Fo> 4σ(Fo) R1/wR2= 0.055/0.189. In this structure, octahedral ZrI62- ions center about 25% of the large cavities (Zr-I = 2.91(4) Å). Each coordinates to eight Tl+ ions and they are further bridged by Tl+ ions in the planes of 8-rings to form a cubic three-dimensional ZrI6Tl119+ cationic cluster. About 1.5 Tl+ ions per unit cell moved to deeper side of sodalite cavity after reaction with ZrI4(g). The remaining Tl+ ions occupy well-established cation positions near 6- and 8-rings.
Keywords
Zeolite A; $ZrI_{6}Tl_{11}^^{9+}$ cationic cluster;
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