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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >New sodalite frameworks; synthetic tugtupite and a beryllosilicate framework with a 3 : 1 Si : Be ratio
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New sodalite frameworks; synthetic tugtupite and a beryllosilicate framework with a 3 : 1 Si : Be ratio

机译:新的方钠石框架; Si:Be比为3:1的合成蒙脱土和铍硅酸盐骨架

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摘要

Compounds of the formula Na-8[Si(6 + y)BeyAl(6 - 2y)O(24)]X-2, with X = Cl and Br, and y = 1, 2 and 3 have been synthesised and structurally characterised by combined powder X-ray and neutron diffraction pro. le analysis. These materials adopt the sodalite framework ( SOD) with the tetrahedral species, BeO4, AlO4 and SiO4, disordered across the framework positions. Na-8[Si8Be2Al2O24]Cl-2, (y = 2), is a synthetic analogue of the naturally occurring semi-precious gemstone tugtupite, while Na-8[Si9Be3O24]X-2, X = Cl and Br represents a new tetrahedral framework stoichiometry with a Si : Be ratio of 3 : 1. Additional characterisation using Si-29 MASNMR, IR spectroscopy and high-temperature, neutron diffraction show that the observed structure - property trends found when modelling sodalite materials can be extended to these new framework compositions.
机译:合成了X = Cl和Br,y = 1,2和3的式Na-8 [Si(6 + y)BeyAl(6-2y)O(24)] X-2的化合物并对其结构进行了表征结合粉末X射线和中子衍射仪。乐分析。这些材料采用方钠石骨架(SOD),其四面体物种BeO4,AlO4和SiO4在骨架位置无序排列。 Na-8 [Si8Be2Al2O24] Cl-2(y = 2)是天然存在的半宝石蒙脱石的合成类似物,而Na-8 [Si9Be3O24] X-2,X = Cl和Br代表新的四面体Si:Be比为3:1的骨架化学计量。使用Si-29 MASNMR,IR光谱和高温中子衍射进行的其他表征表明,对方钠石材料进行建模时发现的观察到的结构-性能趋势可以扩展到这些新骨架成分。

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