A novel topology, consisting of a three-dimensional system of large pore channels, is found for the zeolite ITQ-7 (see picture). This material has been synthesized by combining the structure-directing effects of fluoride ions and a new organic cation purposefully designed to promote the crystallization of a low-density silica phase. ITQ-7 is the least dense crystalline silica phase known so far.
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| http://dx.doi.org/10.1002/(SICI)1521-3773(19990712)38:13/14<1997::AID-ANIE1997>3.0.CO;2-U | DOI Listing |
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