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Protozeolitic nanoclusters or “zeolite seeds” templated by quaternary ammonium ions are shown to be effective precursors for the assembly of an improved class of aluminosilicate mesostructures, denoted MSU-S, which retain well-expressed hexagonal X-ray diffraction patterns and open mesopores even after exposure to steam at 600°C (see picture).
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Liu et al. (2001) studied this question.
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