Open AccessJournal Article
The framework topology of zeolite beta
John B. Higgins,R.B. LaPierre,John L. Schlenker,A.C. Rohrman,J.D. Wood,G.T. Kerr,W.J. Rohrbaugh +6 more
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TLDR
The tetrahedral framework structure of zeolite beta is disordered along (001) planes as mentioned in this paper, and the disordered structure is related by a/3 and/or b/3 displacements on (1) planes to three ordered polytype structures with triclinic, monoclinic and tetragonal symmetry.Abstract:
The tetrahedral framework structure of zeolite beta is disordered along (001). The disordered structure is related by a/3 and/or b/3 displacements on (001) planes to three ordered polytype structures with triclinic, monoclinic, and tetragonal symmetry. Three mutually perpendicular 12-ring channel systems are characteristic of the three ordered polytypes and the disordered beta structure. The proposed framework structures are consistent with the known diffraction, sorption an cation exchange properties of zeolite beta.read more
Citations
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Journal ArticleDOI
Unraveling the Twin and Tunability of the Crystal Domain Sizes in the Medium-Pore Zeolite ZSM-57 by Electron Crystallography.
Lei Wang,Nana Yan,Nana Yan,Xiaona Liu,Xiaona Liu,Zhao Xuebin,Zhao Xuebin,Meikun Shen,Leifeng Liu,Peng Tian,Peng Guo,Zhongmin Liu +11 more
TL;DR: The different morphologies of a medium-pore (10×8-ring) zeolite prepared by employing an identical organic structure-directing agent and different inorganic cations result in the distinct catalytic lifespan of the methanol conversion and selectivity of lower olefins.
Structure Determination and Prediction of Zeolites : A Combined Study by Electron Diffraction, Powder X-Ray Diffraction and Database Mining
TL;DR: In this paper, the authors introduce the concept of Zeolites, which are crystalline microporous aluminosilicates with well-defined cavities or channels of molecular dimensions.
Book ChapterDOI
Chiral Organic Structure-Directing Agents
TL;DR: The main strategy to induce chirality in zeolite-type materials has been the use of chiral structure-directing agents, in an attempt to transfer their chiral feature into the nascent Zeolite structure as discussed by the authors.
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Direct evidence of advantage of using nanosized zeolite Beta for ISFET-based biosensor construction
Esin Soy,Sezin Galioglu,Oleksandr O. Soldatkin,Sergei V. Dzyadevych,Juliusz Warzywoda,Albert Sacco,Burcu Akata +6 more
TL;DR: In this article, the performance of ion sensitive field effect transistor (ISFET) biosensors was investigated by the incorporation of zeolite Beta nanoparticles with varying Si/Al ratios.
Book ChapterDOI
Faults, Intergrowths and Random Phases in the ABC-D6R Family of Zeolites
R. Szostak,Karl Petter Lillerud +1 more
TL;DR: Faulting in zeolite structures may be an isolated event occurring in the growth of a crystalline phase such as the formation of a twin crystal or mirror plane as mentioned in this paper, which is known as domain intergrowths.
References
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Journal ArticleDOI
The crystal structure of mordenite (ptilolite)
TL;DR: Mordenite, a zeolite, was derived by superposition of the three-dimensional Patterson function and partially refined assuming the centric symmetry Cmcm or Cmc2t as discussed by the authors.
Journal ArticleDOI
The framework topology of ZSM-12: A high-silica zeolite
TL;DR: In this article, the structure of ZSM-12, a high-silica zeolite, was determined by analysis of electron and X-ray powder diffraction data combined with model building.
Journal ArticleDOI
The framework topology of ZSM-22: A high silica zeolite
TL;DR: ZSM-22 as discussed by the authors, an orthorhombic high silica zeolite (Cmcm, a = 13.86 ± 0.03A, b = 17.41± 0.04A, and c = 5.5 × 4.5 A), has a framework consisting of 5-, 6- and 10-rings.
Journal ArticleDOI
The framework topology of ZSM-48: A high silica zeolite
TL;DR: In this article, a disordered structure consisting of ferrierite sheets linked via bridging oxygens located on mirror planes is proposed for this material, characterized by ten-ring noninterpenetrating linear channels whose ideal dimensions are 5.3 × 5.6 A.
Journal ArticleDOI
The framework topology of ZSM-23: A high silica zeolite
A.C. Rohrman,R.B. LaPierre,J.L. Schlenker,J.D. Wood,Ernest W. Valyocsik,M.K. Rubin,J.B. Higgins,W.J. Rohrbaugh +7 more
TL;DR: ZSM-23 as discussed by the authors is a high-silica zeolite with lattice parameters of: a = 5.01 ± 0.02A, b = 21.52± 0.04A, and c = 11.13 ± 1.03A.