Synthesis and Structural Characterization of Microporous Yttrium and Calcium Silicates
作者： João Rocha , Paula Ferreira , Zhi Lin , Paula Brandão , A. Ferreira
DOI: 10.1021/JP9803337
关键词:
摘要: The synthesis and structural characterization of AV-1 (Aveiro microporous solid no. 1), the first synthetic yttrium silicate containing stoichiometric amounts framework sodium (and yttrium) cations, are reported. AV-1, Na4K2Y2Si16O38·10H2O, possesses structure rare mineral montregianite. AV-2, an alkali calcium hydrate (ideal composition HKCa2Si8O19·6H2O) analogue rhodesite, also structures AV-2 characterized by same type double layers, but important differences exist with respect to constitution octahedral layers channel species. AV materials have been a range techniques, viz., scanning electron microscopy (SEM), powder X-ray diffraction (XRD), 29Si 23Na single- triple-quantum (3Q) magic-angle spinning (MAS) NMR spectroscopy, Fourier transform spectroscopy (FTIR), thermogravimetric analysis (TGA).
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