caa a22 4500 606195599 CHVBK 20210128100920.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s10934-015-9957-1 doi (NATIONALLICENCE)springer-10.1007/s10934-015-9957-1 An investigation into the crystallization of low-silica X zeolite [Elektronische Daten] [Lu Zhang, Yining Huang] The crystallization of low-silica X (LSX) zeolite with FAU topology was examined under hydrothermal synthesis conditions. PXRD was employed to follow the evolution of the long-range ordering of the gel. Raman spectra provided information on various ring and cage species existing in the gel. 27Al and 29Si solid-state NMR spectroscopy was utilized to monitor the change in local environment of tetrahedral sites. The results indicate that an amorphous aluminosilicate phase was formed immediately upon mixing different reactive species. Hydrothermal treatment led to the formation of sodalite-cage like species and the species with larger cavities, joint four-member rings (4Rs) and branched 4Rs, which are the structural building units of the FAU framework. These units were assembled into the crystalline structure of LSX zeolite. 23Na and 39K solid-state NMR results show that the transformation process was accompanied by the changes of the local structure of hydrated Na+ and K+ ions. The two types of cations may work synergistically to template the crystallization of LSX zeolite. Springer Science+Business Media New York, 2015 Zeolites nationallicence Faujasite nationallicence Crystallization nationallicence Hydrothermal synthesis nationallicence Solid-state NMR nationallicence Raman spectroscopy nationallicence Zhang Lu Department of Chemistry, The University of Western Ontario, N6A 5B7, London, ON, Canada aut Huang Yining Department of Chemistry, The University of Western Ontario, N6A 5B7, London, ON, Canada aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/4(2015-08-01), 843-850 1380-2224 22:4<843 2015 22 10934 https://doi.org/10.1007/s10934-015-9957-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-9957-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Lu Department of Chemistry, The University of Western Ontario, N6A 5B7, London, ON, Canada aut NATIONALLICENCE 700 1- Huang Yining Department of Chemistry, The University of Western Ontario, N6A 5B7, London, ON, Canada aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/4(2015-08-01), 843-850 1380-2224 22:4<843 2015 22 10934