Počet záznamů: 1

Unraveling the perplexing structure of the zeolite SSZ-57

  1. 1.
    0365564 - FZU-D 2012 RIV US eng J - Článek v odborném periodiku
    Baerlocher, Ch. - Weber, T. - McCusker, L.B. - Palatinus, Lukáš - Zones, S. I.
    Unraveling the perplexing structure of the zeolite SSZ-57.
    Science. Roč. 333, č. 6046 (2011), 1134-1137 ISSN 0036-8075
    Výzkumný záměr: CEZ:AV0Z10100521
    Klíčová slova: zeolite * disorder * superspace * Monte Carlo simulation * diffuse scattering
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 31.201, rok: 2011

    Previous high-resolution x-ray powder diffraction and transmission electron microscopy studies of the zeolite SSZ-57 could not fully elucidate the structural basis for its puzzling adsorption behavior, which appears to be intermediate between that of a medium- (10-ring) and a large-pore (12-ring) zeolite. Now by applying advanced crystallographic techniques and crystal chemistry considerations to high-quality single-crystal x-ray diffraction data collected on a microcrystal (about 2 micrometers by 2 micrometers by 8 micrometers), we have been able to derive a comprehensive description of its silicate framework structure.The framework is related to that of ZSM-11 but is commensurately modulated along the c axis to yield a structure with a 12-ring:10-ring ratio of 1:15. Disorder of the 12-rings results in a three-dimensional 10-ring channel system with large isolated pockets. The structure helps to clarify the material´s catalytic activity.
    Trvalý link: http://hdl.handle.net/11104/0200782