A guideline for zeolite phase selection in inorganic synthesis media is proposed, based on a systematic exploration of synthesis from inorganic media using liquid Na⁺, K⁺, and Cs⁺ aluminosilicate. Although the Si/Al ratio of the zeolites is a continuous function of the synthesis conditions, boundaries between topologies are sharp. The here-derived phase selection criterion relates the obtained zeolite topology to the Si/Al ratio imposed by the synthesis medium. For a given Si/Al ratio, the framework with the highest occupation of topologically available cation sites is favored. The large number of published zeolite syntheses supporting the observation provides strong indication that the concept is applicable in a larger context. The proposed criterion explains how minor variations in the composition of inorganic synthesis media induce the commonly occurring, abrupt changes in topology. It highlights underlying reasons causing the strict demarcation of stability fields of the as-synthesized zeolites experimentally observed in inorganic synthesis.

中文翻译：

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影响无机沸石合成相选择的结构方面

^{基于对使用液态 Na +}、K ⁺和 Cs ⁺从无机介质合成的系统探索，提出了无机合成介质中沸石相选择的指南铝硅酸盐。虽然沸石的 Si/Al 比是合成条件的连续函数，但拓扑结构之间的界限很明显。此处导出的相选择标准将获得的沸石拓扑结构与合成介质施加的 Si/Al 比相关联。对于给定的 Si/Al 比，具有最多拓扑可用阳离子位点的框架是有利的。支持该观察的大量已发表的沸石合成提供了强有力的迹象，表明该概念适用于更大的范围。拟议的标准解释了无机合成介质成分的微小变化如何引起拓扑结构中常见的突然变化。