ChemInform Abstract: Synthesis and Structural Characterization of Microporous Yttrium and Calcium Silicates

Autor:	J. D. Pedrosa De Jesus, Artur Ferreira, João Rocha, Paula Brandão, Zhi Lin, Paula Ferreira
Rok vydání:	2010
Předmět:	chemistry.chemical_compound Thermogravimetric analysis chemistry chemistry.chemical_element General Medicine Yttrium Microporous material Fourier transform infrared spectroscopy Calcium silicate hydrate Alkali metal Silicate Fourier transform spectroscopy Nuclear chemistry
Zdroj:	ChemInform. 29
ISSN:	1522-2667 0931-7597
DOI:	10.1002/chin.199835008
Popis:	The synthesis and structural characterization of AV-1 (Aveiro microporous solid no. 1), the first synthetic microporous yttrium silicate containing stoichiometric amounts of framework sodium (and yttrium) cations, are reported. AV-1, Na4K2Y2Si16O38·10H2O, possesses the structure of the rare mineral montregianite. The synthesis and structural characterization of AV-2, an alkali calcium silicate hydrate (ideal composition HKCa2Si8O19·6H2O) analogue of the rare mineral rhodesite, are also reported. The structures of AV-1 and AV-2 are characterized by the same type of double silicate layers, but important differences exist with respect to the constitution of the octahedral layers and channel species. AV materials have been characterized by a range of techniques, viz., scanning electron microscopy (SEM), powder X-ray diffraction (XRD), 29Si and 23Na single- and triple-quantum (3Q) magic-angle spinning (MAS) NMR spectroscopy, Fourier transform spectroscopy (FTIR), and thermogravimetric analysis (TGA).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::883f9377da15b9b3b2edc1e57ec4c58b https://doi.org/10.1002/chin.199835008 Zobrazit plný text záznamu Plný text