Beryllosilicate Frameworks and Zeolites

Using inspiration derived from studying naturally occurring minerals, a series of framework beryllosilicates have been synthesized under hydrothermal conditions. These include two new zeolite topologies, a unique layered beryllosilicate, and beryllosilicate analogues of numerous aluminosilicate zeolites. Materials with the structure of the rare zeolite mineral nabesite have been synthesized for the first time, including both sodium and potassium derivatives. The structural chemistry of these beryllosilicates frameworks is discussed with reference to the networks of linked tetrahedra, which include the first instance of pentagonal, two-dimensional Cairo-tiling of silicate tetrahedra in one of the new zeolite topologies, their porosity, and their thermal stability.

本研究以天然产出矿物的研究为灵感来源，通过水热条件合成了一系列骨架型铍硅酸盐（framework beryllosilicates）。该系列产物包含两种新型沸石拓扑结构、一种独特的层状铍硅酸盐，以及多种铝硅酸盐沸石的铍硅酸盐同构类似物。研究团队首次成功合成了具有罕见沸石矿物纳贝石（nabesite）结构的材料，涵盖钠基与钾基两类衍生物。本文针对此类铍硅酸盐骨架的结构化学展开讨论，涉及由连接四面体构成的网络结构——其中一种新型沸石拓扑结构中首次出现硅酸盐四面体的五边形二维开罗铺排（Cairo-tiling）结构——、材料的孔隙特性与热稳定性。