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Título: | Synthesis and in situ transformation of PST-1: a potassium gallosilicate natrolite with a high Ga content |
Autor: | Shin, Jiho; Kim, Seok Han; Camblor, Miguel Ángel CSIC ORCID ; Warrender, Stewart J.; Miller, Stuart R.; Zhou, Wuzong; Wright, Paul A.; Hong, Suk Bong | Palabras clave: | Potassium-gallosilicate-natrolite Synthesis In-situ-transformation Thermal-hydrothermal-stability Zeolites |
Fecha de publicación: | 12-ene-2010 | Editor: | Royal Society of Chemistry (UK) | Citación: | Dalton Transactions | Resumen: | The synthetic details of a novel potassium gallosilicate natrolite with Si/Ga = 1.28, denoted PST-1, are described. The presence of K+ and Ga with well-defined levels of concentration in the synthesis mixture is essential for directing its crystallisation. PST-1 transforms rapidly into TNU-6 under hydrothermal conditions, behaviour that contrasts sharply with its very high thermal and hydrothermal stability, which is unusual for a material of such a high Ga content. These stability issues are discussed and
rationalized based on chemical composition, likely violations of Loewenstein’s rule and the temperature of dehydration of as-made K-PST-1. The crystal structure of TNU-6 has been resolved through the combined use of synchrotron X-ray and electron diffraction data; it has the BaFeGaO4 structure type
with an additional √3a x √3a “GeAlO4” superstructure that arises from tilting of some of the tetrahedral units in all of the 6-rings. Dalton Transactions 2010, 39, 2246-2253 |
Descripción: | Supplementary material included at the end of the file. Material suplementario incluido al final del archivo. | Versión del editor: | http://pubs.rsc.org/en/Content/ArticleLanding/2010/DT/b920540n | URI: | http://hdl.handle.net/10261/36678 | DOI: | 10.1039/b920540n |
Aparece en las colecciones: | (ICMM) Artículos |
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PST-1ms-DT-2010, 39, 2246-2253 DigitalCSIC.pdf | 1,33 MB | Adobe PDF | Visualizar/Abrir |
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