Abstract
A new polymorph of SiO2 (silicalite, refractive index 1.39, density 1.76 g cm−3) has a novel topologic type of tetrahedral framework. This encloses a three-dimensional system of intersecting channels defined by 10-rings wide enough to adsorb molecules up to 0.6 nm diameter. Silicalite is hydrophobic and organophilic, and selectively adsorbs organic molecules over water.
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Flanigen, E., Bennett, J., Grose, R. et al. Silicalite, a new hydrophobic crystalline silica molecular sieve. Nature 271, 512–516 (1978). https://doi.org/10.1038/271512a0
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DOI: https://doi.org/10.1038/271512a0
