The Synthesis and Structure of Silica-Sodalite from Nonaqueous Systems

A silica polymorph, silica-sodalite was synthesized from a nonaqueous system NaOH-SiO2-C2H4(OH)2 and its chemical compositionwas determined to be Si12 O24,2C2H4(OH)2 by the X-fluorescence,thermogravimetric and organic elemental analyses. The single crystal X-ray diffraction structure determination of the silica-sodaliteshowed that the silica-sodalite is cubic, spacing group I23 and unitcell parameter a= 8.8354A. The IF and solid state high resolution Siand 13 C NMR spectra of the silica-sodalite were measured and discussed .