Apr 01, 2012 · The variety of natural zeolite types results from differences in the way in which the SiO 4 and AlO 4 tetrahedra may link in space in one, two, or three dimensions and from the other ion types that are substituted within the channels. The tetrahedra of oxygens are arranged in four, five, six, etc. member rings, commonly called Secondary Building Units (SBU), which combine …
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