Synthesis and structure of pure SiO2 chabazite: the SiO2 polymorph with the lowest framework density

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María-José Díaz-Cabañas and Philip A. Barrett


Abstract

A SiO2 material with the lowest framework density (15.4 SiO2 nm–3) and the largest void volume fraction (nearly 50%) ever reported for crystalline silica polymorphs has been synthesised, and its structure solved by direct methods and fully refined using low-resolution powder X-ray diffraction data.


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