Structural study of pure silica and Ge-containing zeolite ITQ-24
نویسندگان
چکیده
منابع مشابه
Location of Ge and extra-framework species in the zeolite ITQ-24.
The germanosilicate ITQ-24 (IWR framework type) was synthesized in fluoride medium using 1,3,5-tris(1,2-dimethylimidazolium) benzene as the structure directing agent (SDA). A structure analysis of the as-synthesized ITQ-24 material using synchrotron powder diffraction data and difference electron density calculations have allowed the fluoride ions and the germanium atoms to be located and the c...
متن کاملTemperature dependent thermal conductivity of pure silica MEL and MFI zeolite thin films
zeolite thin films Jin Fang, Yi Huang, Christopher M. Lew, Yushan Yan, and Laurent Pilon Department of Mechanical and Aerospace Engineering, Henry Samueli School of Engineering and Applied Science, University of California-Los Angeles 420 Westwood Plaza, Los Angeles, California 90095, USA Department of Chemical Engineering and Materials Science, University of Minnesota Minneapolis, Minnesota 55...
متن کاملPropene adsorption sites in zeolite ITQ-12: a combined synchrotron X-ray and neutron diffraction study.
The adsorption site of propene in the small-pore, pure silica zeolite [Si24O48]-ITW-ITQ-12 has been characterized via Rietveld refinement of the crystal structure of propene-loaded ITQ-12 on the basis of synchrotron X-ray and neutron diffraction data taken at 298 K. The structure can be described with a monoclinic unit cell having Cm symmetry and unit cell parameters a = 10.436 angstroms, b = 1...
متن کاملExtra-large pore zeolite (ITQ-40) with the lowest framework density containing double four- and double three-rings.
The first zeolite structure (ITQ-40) that contains double four (D4) and double three (D3) member ring secondary building units has been synthesized by introducing Ge and NH(4)F and working in concentrated synthesis gels. It is the first time that D3-Rs have been observed in a zeolite structure. As was previously analyzed [Brunner GO, Meier, WM (1989) Nature 337:146-147], such a structure has a ...
متن کاملTEM investigation of formation mechanism of monocrystal-thick b-oriented pure silica zeolite MFI film.
The first direct transmission electron microscopic (TEM) observation has been carried out on the continuous monocrystal-thick b-oriented pure silica zeolite MFI films produced by in situ crystallization. The self-supporting film samples for TEM study were fabricated by dissolving the steel substrate with acid. This TEM study is free of those artifacts that are typically associated with TEM samp...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Zeitschrift für Kristallographie
سال: 2007
ISSN: 0044-2968
DOI: 10.1524/zkri.2007.2007.suppl_26.393