29 Si and 27Al m.a.s.n.m.r. techniques have been used to study the dealumination process of a Y zeolite. Dealumination by steaming or SiCl4 treatment leads to the formation of silica and/or silica–alumina type phases. Extraframework aluminium shows a different type of coordination (tetra-, penta- or octa-hedral) depending on the method of dealumination.
J. Sanz, V. Fornés and A. Corma, J. Chem. Soc., Faraday Trans. 1, 1988, 84, 3113 DOI: 10.1039/F19888403113
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