Synthesis of Fully Dehydrated Partially Cs⁺-exchanged Zeolite Y (FAU, Si/Al = 1.56), |Cs₄₅Na₃₀|[Si₁₁₇Al₇₅O₃₈₄]-FAU and Its Single-crystal Structure

Abstract

Large single crystals of zeolite, |Na75|[Si117Al75O384]-FAU (Na-Y, Si/Al = 1.56), were synthesized from gels with composition of 3.58SiO2 : 2.08NaAlO2 : 7.59NaOH : 455H2O : 5.06TEA : 2.23TCl. One of these, a colorless single-crystal was ion exchanged by allowing aqueous 0.02 M CsOH to flow past the crystal at 293 K for 3 days, followed by dehydration at 673 K and 1 × 10 -6 Torr for 2 days. The crystal structure of fully dehydrated partially Cs

Crystal Structure and Luminescence of Sn,I,Cs,Na–Y, a Lead-Free Zeolite Containing Tetrahedrally Distorted Cubes of Sn4I44+

“…Of the 16 D6Rs per unit cell, 13.3 are occupied as shown in (a), 1.4 as shown in (b), and 1.3 as shown in (c). Similar placements of Cs + and Na + ions had been seen in previous studies. , This maximizes the intercationic contact distances. To avoid the Na1···Na1A = 2.97(11) Å and Na1···Cs1A = 3.929(6) Å approaches, the Na1A and Cs1A positions are not fully occupied.…”

“…Since both Cs + and Na + had been found at the centers of double 6-rings (D6Rs, site I) in previous studies, ,− the peak that appeared at (0,0,0) was refined both as Cs + and as Na + . As Cs + , it refined to 2.48(12) ions per unit cell, and as Na + it refined to 12.8(6) ions.…”