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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Structural disorder of a new zeolite-like lithosilicate, K(2.6)Li(5.4)(Li4Si16O38).4.3H2O.
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Structural disorder of a new zeolite-like lithosilicate, K(2.6)Li(5.4)(Li4Si16O38).4.3H2O.

机译：一种新型沸石状锂硅酸盐K（2.6）Li（5.4）（Li4Si16O38）.4.3H2O的结构无序。

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摘要

The framework structure of the synthetic microporous lithosilicate RUB-30 (K(2.6)Li(5.4)[Li4Si16O38].4.3H2O) is similar to that of the fibrous zeolites such as natrolite, edingtonite and thomsonite, since all their frameworks include the same secondary structural building unit, the so-called 4-1 T5O10 cluster of tetrahedra. Unique to the structure of RUB-30, each 4-1 unit consists of a LiSi4O10 moiety within which the single [LiO4] tetrahedron is strictly segregated from the other four [SiO4] tetrahedra. The connection of neighboring 4-1 units through edge-sharing [LiO4] tetrahedra results in a new framework topology. The present work reports an ;average' structure of RUB-30 solved by synchrotron X-ray single-crystal diffraction data collected at a second-generation source. A superstructure with a x 2b x c (relative to the subcell quoted above) could be seen in X-ray diffraction data collected with better resolution and higher brightness at a third generation source. Diffuse streaks along k with l = odd and unusual superstructure hkl reflections, with k = odd and l = odd only, indicate a more complicated real structure of the material. To explain this observation we propose two different structure types which are statistically, but coherently, intergrown in RUB-30.
机译：合成的微孔锂硅酸盐RUB-30（K（2.6）Li（5.4）[Li4Si16O38] .4.3H2O）的骨架结构与纤维沸石（如钠沸石，爱丁顿和硫磺沸石）的骨架结构相似，因为它们的骨架均相同二级结构建筑单元，即所谓的4-1 T5O10四面体簇。 RUB-30的结构独特，每个4-1单元由一个LiSi4O10部分组成，其中单个[LiO4]四面体与其他四个[SiO4]四面体严格分开。通过边缘共享[LiO4]四面体的相邻4-1单元的连接产生了新的框架拓扑。本工作报告了RUB-30的“平均”结构，该结构通过在第二代光源处收集的同步加速器X射线单晶衍射数据解决。在x射线衍射数据中可以看到具有x 2b x c的上部结构（相对于上面引用的子电池），该数据在第三代光源处具有更好的分辨率和更高的亮度。沿着k的扩散条纹，其中l =奇数和异常的上层结构hkl反射（仅k =奇数和l =奇数）表示材料的更复杂的实际结构。为了解释这一观察结果，我们提出了两种不同的结构类型，它们在RUB-30中相互统计，但相互关联。

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