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Abstract
A new inorganic scintillator has been prepared by the assembly of thallium, zirconium, and chloride ions in a zeolite. Also, for the first time, a 4+ cation has been exchanged directly into a zeolite. From |Na12(H2O)x|[Si12Al12O48]-A (zeolite LTA), |Zr1.7Tl5.4Cl1.7|[Si13.5Al10.5O48]-A and |Zr2.1Tl1.6Cl3.0|[Si17.4Al6.6O48]-A were prepared by the thallous ion exchange (TIE) method: fully dehydrated Tl12-A was treated with ZrCl4 (g, 3.7 × 103 Pa) at 553 and 623 K, respectively. Their crystal structures were determined by single-crystal crystallography using synchrotron X-radiation and their compositions were partially confirmed by SEM-EDX analyses. Their structures were refined in the space group Pm3m (a = 12.215(1) and 11.945(1) A) with all unique data to the final error indices R1 = 0.047 and 0.075 for the 680 and 380 reflections for which Fo > 4σ(Fo), respectively. Extraframework Zr4+ and Zr2+ ions had replaced some of the Tl+ ions in Tl12-A. Some Zr4+ ions are 4-coordinate with three bonds to framework o...
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