SIMULTANEOUS MONITORING OF AMORPHOUS AND CRYSTALLINE PHASES IN SILICALITE PRECURSOR GELS - AN IN-SITU HYDROTHERMAL AND TIME-RESOLVED SMALL-ANGLE AND WIDE-ANGLE X-RAY-SCATTERING STUDY

The gel transformations and subsequent crystallization that occur in t he precursor reaction mixture of silicalite were investigated using si multaneous small-and wide-angle X-ray scattering (SAXS-WAXS). The SAXS -WAXS measurements, together with the use of a high flux of synchrotro n radiation and a newly developed high-pressure reaction cell, provide the possibility of in situ hydrothermal and time-resolved monitoring of amorphous gel transformations and crystallization.