ion or amine. The calcined sample obtained from TEOS The effects of acid and base catalysts on the gelation of interca-[ Si (OC 2 H 5 ) 4 ] pillaring exhibited a high surface area, 530 lated TEOS (tetraethylorthosilicate) in H-kenyaite were investim 2 / g. Scholzen et al. ( 18 ) have described the change of gated. It was found that the base-and acid-catalyzed samples the ratio of Q 3 to Q 4 groups caused by silane coupling of show well-ordered basal spacings and supergallery heights (base silicate species with SiOH groups on the interlayered surcatalyst, 24.3 A Λ; acid catalyst, 22.1 A Λ). The calcination of the face of magadiite. Sprung et al. ( 6 ) reported that the pilsiloxane-intercalates yields silica-intercalated products, showing lared derivatives of magadiite can be obtained from the the 1 Γ 3 A Λreduction of basal spacings. The calcined samples calcination of hydrolyzed phenyltrichlorosilane-magahave high surface areas in the range 533 Γ 606 m 2 /g, depending diites. Daily and Pinnavaia ( 4 ) synthesized supergallery on the catalyst types. As the gallery height of the calcined samples decreases, the specific surface area increases due to the develop-derivatives on the basis of H-magadiite by gelation of ment of microporosity. It was also found that the base-and acid-TEOS with EtOH suspension. After calcining to remove catalyzed samples exhibit narrow pore-size distributions near 22 organic compounds, pillared magadiite with surface areas and 18 A Λ, respectively. The pore-size distributions of the calcined of about 520 -680 m 2 / g, depending on the amount of samples are closely related to the gallery heights. α§ 1996 Academic gelled TEOS, was formed. However, the pillaring of ke-Press, Inc. nyaite was rarely reported. Recently, Landis et al. (5 ) Key Words: kenyaite; silica pillaring; molecular sieve; gellation. prepared pillared derivatives on the basis of H-kenyaite by gellation of TEOS with EtOH suspension. The calcined sample exhibited a high surface area, 600 m 2 / g.