Yannick Lorgouilloux

IM-17: a new zeolitic material, synthesis and structure elucidation from electron diffraction ADT data and Rietveld analysis

The synthesis and the structure of IM-17, a new germanosilicate with a novel zeolitic topology, prepared hydrothermally with decamethonium as the organic structure directing agent, are reported. The structure of calcined and partially rehydrated IM-17 of chemical formula per unit cell |(H2O)14.4|[Si136.50Ge39.50O352] was solved ab initio using electron diffraction ADT data in the acentric Amm2 (setting Cm2m) space group and refined by the Rietveld method. This new zeolite framework type contains a 3D pore system made of intersecting 12, 10 and 8-ring channels.

Structure orienting role of germanium in zeolite synthesis

Abstract This paper deals with the synthesis results obtained from pure silica and (Si, Ge) systems in presence of hexamethonium cations, Kryptofix2,2,2 and 5-azoniaspiro[ [4] , [5] ]decane derivative cations as organic structure directing agents (OSDA) in hydroxide or fluoride media. The obtained new materials Mu-31, IM-9, IM-10 (UOZ), IM-11(LTA), IM-12 (UTL) all contain D4MR units, confirming the orienting effect of the germanium and/or the fluoride anions towards this small cage. Surprisingly, the extra-large pore IM-12 zeolite could not be obtained in the fluoride medium.

Primary linear diamines as structure directing agents in hydrothermal synthesis of germanates

Abstract Hydrothermal synthesis with hexamethylenediamine and ethylenediamine as structure directing agents and amorphous GeO 2 and SiO 2 as framework atoms sources in hydroxide or fluoride media led to IM-13, IM-14 and IM-15, three new materials. The structures of IM-14 and IM-13 were investigated using direct methods on powder X-ray diffraction data and the charge flipping method on a single crystal, respectively. Both materials are open framework structures displaying common structure building units.

Disordered zeolite solved by combining electron diffraction, HRTEM and XRPD

Magdalena Ola Cichocka1, Yannick Lorgouilloux2, Brice Bellet2, Stef Smeets1, Jie Su1, Philippe Caullet2, Nicolas Bats3, Lynne B. McCusker1, Jean-Louis Paillaud2, Xiaodong Zou1 1Berzelii Center EXSELENT On Porous Materials, MMK, Stockholm University, Stockholm, Sweden, 2Axe Matériaux à Porosité Contrôlée (MPC), Institut de Science des Matériaux de Mulhouse (IS2M), UMR CNRS 7361, Université de Haute-Alsace, Cedex, France, 3IFP Energies nouvelles, Rond Point de l’échangeur de Solaize BP 3, Solaize, France E-mail: magdalena.cichocka@mmk.su.se