### Pillared Clays and Related Catalysts - PDF Free Download

1.3.1.2 Zirconia-Pillared Montmorillonite If the mixture of clay and zirconium solution is irradiated (intercalation step) for 5, 10, 20, and 30 min, maintaining the ratio of zirconium to clay constant and equal to 2 mmol/g, the interlayer distances, determined by X-ray diffraction, turn out to be 19 Å [27].