The structure model of an ABC-6 family zeolite with the 4-layer stacking sequence AABC was first proposed in 1981, but it has remained undiscovered so far. Here, we report the synthesis of PST-33, which is a small-pore aluminosilicate (Si/Al = 4.1) zeolite with this framework topology, using 5-azonia-spiro[4.4]nonane ions as an organic structure-directing agent via the so-called multiple inorganic cation approach, and its structure solved by single-crystal X-ray crystallography. PST-33 contains a two-dimensional 8-membered ring pore system consisting of 8-hedral ([4⁶6²]) double 6-ring (d6r), 14-hedral ([4⁶6⁸]) sod, and 17-hedral ([4⁹6⁵8³]) lev cages. The Na⁺ form of PST-33 showed comparable CO₂ adsorption properties to the corresponding cation form of zeolite A and chabazite.

中文翻译：

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PST-33：堆叠顺序为AABC的四层ABC-6沸石

具有4层堆叠序列AABC的ABC-6族沸石的结构模型于1981年首次提出，但至今仍未被发现。在这里，我们报告了P​​ST-33的合成，该化合物是具有这种骨架拓扑的小孔硅铝酸盐（Si / Al = 4.1）沸石，使用5-氮杂螺环[4.4]壬烷离子作为有机结构导向剂，通过所谓的多重无机阳离子方法，其结构通过单晶X射线晶体学解决。PST-33包含一个二维8元环孔系统，该系统由8面（[4 ⁶ 6 ² ]）双6环（d6r），14面（[4 ⁶ 6 ⁸ ]）草皮和17组成-hedral（[4 ⁹ 6 ⁵8 ³ ]）lev笼子。PST-33的Na ⁺形式显示出与沸石A和菱沸石相应的阳离子形式相当的CO ₂吸附性能。