From the symposium on Advances in Zeolites and Pillared Clays Synthesis, sponsored by the Petroleum Chemistry Division of the American Chemical Society experts from around the world review: You'll find everything you've ever wanted to know about zeolites and pillared clays: For the novice - how to information on zeolite synthesis. For the expert - a survey of advances in novel zeolites. The mechanism of zeolite crystallisation and crystal growth; spectroscopic characterization of reactants and reaction intermediates; chemistry of silicate solution and reaction effects on crystallization products; the role of organic additives in zeolite formation; novel synthesis methods and procedures for zeolites and pillared clays preparation; new pillaring agents and pillared products; delaminated clays.

the chapters contained in this volume. Chapters dealing with pillared clays char- acterization and testing have been included to illustrate the importance of mod- em characterization techniques and of test reactions in understanding the prop- erties of these materials. A special acknowledgment is made of the generous financial contribution from industrial sponsors, to the many colleagues who acted as referees and to the authors for the time and effort they gave to presenting their research at the symposium and in preparing the camera ready manuscripts. We would also like to thank Professors A. Clearfield, T. J. Pinnavaia, Z. Gabelica, H. Kessler, S. Yamanaka, and to Doctors G. W. Skeel and D. E. W. Vaughan for helping to chair the symposium. Mario L. Occelli Yorba Linda, CA Harry E. Robson Baton Rouge, LA Expanded Clays and Other Microporous Solids 1 APPROACHES TO THE SYNTHESIS OF SUPER GALLERY PILLARED CLAYS Thomas J. Pinnavaia, Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, Michigan 48824 Recent advances in the design of microporous pillared solids with "supergallery" structures are discussed. Supergallery derivatives are defined as intercalates in which the interlayer thickness is substantially larger than the thickness of the host layer. Three general classes of hosts are considered, namely, 2:1 smectite clays,layered double hydroxides (LDHs) , and layered silicic acids.

Top international experts present their findings here on new commercial pillared clays and the latest work in industrial microporous solids. Culled from recent investigations, some presented at the symposium on Advances in Zeolites and Pillared Clays Synthesis sponsored by the American Chemical Society, these papers include previously unpublished reports on commercial materials from major corporations and research institutes. They offer "how to" information on zeolite synthesis, as well as a survey of advances in novel zeolites.

Zeolite synthesis is an active field of research. As long as this continues, new phases will be discovered and new techniques for preparing existing phases will appear. This edition of "Verified Synthesis of Zeolitic Materials" contains all the recipes from the first edition plus 24 new recipes. Five new introductory articles have been included plus those from the first edition, some of which have been substantially revised. The XRD patterns have been recorded using different instrument settings from those in the first edition and are intended to conform to typical X-ray diffraction practice. In most cases, only the XRD pattern for the productas synthesised is printed here. The exceptions are those phases which show marked changes in the XRD pattern upon calcination.