Abstract
An aluminogermanate analog of zeolite X has been synthesized by solution reaction, and characterized by Rietveld analysis of synchrotron powder X-ray diffraction data. The hydrated sample has a chemical formula Na 96Al 96Ge 96O 384· wH 2O, and the material possesses an ordered arrangement of Al and Ge in the framework. A cell parameter of 25.589(1) Å confirms the expected cell expansion over Low Silica X (LSX), although a smaller average framework T–O–T bond angle indicates greater relative cell collapse than for LSX. The distribution of sodium cations in the non-framework sites in NaGeX is significantly different from that in LSX, and appears to deviate from the proposed relationship between Al content and cation siting for hydrated aluminosilicate faujasite-type zeolites.
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