SSZ-26 and SSZ-33: Two Molecular Sieves with Intersecting 10- and 12-Ring Pores

Lobo, Raúl F.; Pan, Ming; Chan, Ignatius Y.; Li, Hongxin; Medrud, Ronald C.; Zones, Stacey I.; Crozier, Peter; Davis, Mark E.

doi:10.1126/science.262.5139.1543

Cited by 171 publications

(100 citation statements)

References 5 publications

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“…Burkett & Davis propose that the organic-inorganic composites take part in nucleation and subsequent crystal growth and that they participate in crystal growth via diffusion to the surface of the growing crystallites (see Figure 5). This mechanistic proposal can account for the layer-by-layer growth inferred from the intergrowth frameworks of ZSM-5/ZSM-11, SSZ-26/SSZ-33/CIT-1 (14,50,51), and zeolite beta (52, …”

Section: Energetic Interactions Of Organic Structure-directin9 Agentsmentioning

confidence: 99%

Synthesis of Porous Silicates

Helmkamp¹,

Davis²

1995

Annu. Rev. Mater. Sci.

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The issues of importance and future concern in the synthesis of porous silicates and porous materials that contain a large fraction of silica, e.g. zeolites and other crystalline molecular sieves, are reviewed. The thermodynamics of zeolite synthesis are discussed, including a detailed thermodynamic analysis of the synthesis of pure-silica ZSM-5. The kinetics of porous silicate synthesis are reviewed, with particular emphasis on the control of porous structure formation through the use of organic structuredirecting agents. Ordered mesoporous materials are discussed in the context of distinguishing their features from zeolites in order to describe further the unique properties of each class of material. Finally, several unresolved issues in the understanding of the synthesis process are outlined, the resolutions of which would aid in the synthesis of porous silicates by design.

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Section: Energetic Interactions Of Organic Structure-directin9 Agentsmentioning

confidence: 99%

Synthesis of Porous Silicates

Helmkamp¹,

Davis²

1995

Annu. Rev. Mater. Sci.

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“…Stacking fault Rietveld refinement will allow the accurate cation distributions, detailed structural information and quantitative analysis of inoperando systems needed for full understanding of their chemistry. Similar faulting precludes detailed structural studies of a range of important zeolites [37][38][39][40][41][42][43][44] . Other areas likely to benefit include materials with low temperature topotactic transformations 77 , intercalation/ion-exchange hosts, a variety of layered minerals 78 , and understanding the details and implications of hexagonal/cubic intergrowths in different forms of ice 50,51 .…”

Section: Discussionmentioning

confidence: 99%

“…29 Examples include a wide range of battery materials [30][31][32][33][34][35][36] , zeolites [37][38][39][40][41][42][43][44] , metals 45,46 , clays 47,48 , diamond 49,50 , ice 50, 51 , nitrides [52][53][54] , carbides [55][56][57] , catalysts 58 , layered hydroxides and other intercalation/ion-exchange hosts [59][60][61][62] . The Rietveld method we describe will be applicable to all these systems and will allow detailed and precise information to be obtained on the structure of individual phases and quantification of phase mixtures and their evolution in operando.…”

Section: Introductionmentioning

confidence: 99%

3D Transition Metal Ordering and Rietveld Stacking Fault Quantification in the New Oxychalcogenides La₂O₂Cu_2–4xCd_2xSe₂

et al. 2016

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. (2016) '3D transition metal ordering and Rietveld stacking fault quantication in the new oxychalcogenides La2O2Cu24xCd2xSe2.', Chemistry of materials., 28 (9). pp. 3184-3195. Further information on publisher's website:http://dx.doi.org/10.1021/acs.chemmater.6b00924 Publisher's copyright statement: This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Chemistry of Materials, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://dx.doi.org/10.1021/acs.chemmater.6b00924].Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. 1+ and Cd 2+ ions segregate into distinct fully occupied and half occupied checkerboard-like layers respectively, leading to complex long-range superstructures in the 3rd (stacking) dimension. To understand the structure and microstructure of these new materials we have developed and implemented a new methodology for studying low and high probability stacking faults using a Rietveldcompatible supercell approach capable of analyzing systems with thousands of layers. We believe this method will be widely applicable.

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“…al. in 1993 and belong to a family of zeolites with three-dimensional intersecting 10-and 12-ring channels [18,19]. SSZ-26 is an aluminosilicate analogue in the family while SSZ-33 is a borosilicate analogue.…”

Section: Ssz-26 and Ssz-33 (Con)mentioning

confidence: 99%

“…The structures of SSZ-26 and SSZ-33 were originally solved by combining HRTEM, SAED, PXRD, adsorption measurements and model building [18,19]. Electron diffraction gave rise to sharp spots for reflections with k ¼ 3n and diffuse streaks for the remaining reflections (insert in Fig.…”

Section: Ssz-26 and Ssz-33 (Con)mentioning

confidence: 99%

Stacking disorders in zeolites and open-frameworks – structure elucidation and analysis by electron crystallography and X-ray diffraction

Willhammar¹,

Zou²

2013

Zeitschrift für Kristallographie - Crystalline Materials

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Abstract. Intergrowth and stacking disorders are often found in minerals and synthetic zeolites and inorganic openframeworks. Structure elucidation of stacking disorders in these materials have been difficult and structure solution of stacking disorders in unknown zeolites and open-frameworks has been challenging. There exist no standard methods for structure analysis of such disordered materials. In this review we present various stacking disorders and intergrowth in a number of representative zeolite families containing stacking disorders. These include zeolite beta, SSZ-26/SSZ-33, ITQ-39, ABC-6, ZSM-48, SSZ-31, UTD-1, faujasite FAU/EMT, pentasil ZSM-5/ZSM-11, ITQ-13/ITQ-34, ITQ-22/ITQ-38 etc. Stacking disorders in open-frameworks containing mixed coordinations, including titanosilicates ETS-10 and ETS-4, and the silicogermanate SU-JU-14 are also described. Various crystallographic methods used for solving disordered structures are summarized. The methods include powder X-ray diffraction (PXRD), electron diffraction, high resolution transmission electron microscopy (HRTEM), and single-crystal X-ray diffraction. Examples of model building combined with simulations of PXRD and single crystal X-ray diffraction to verify the structure models are given.

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SSZ-26 and SSZ-33: Two Molecular Sieves with Intersecting 10- and 12-Ring Pores

Cited by 171 publications

References 5 publications

Synthesis of Porous Silicates

Synthesis of Porous Silicates

3D Transition Metal Ordering and Rietveld Stacking Fault Quantification in the New Oxychalcogenides La₂O₂Cu_2–4xCd_2xSe₂

Stacking disorders in zeolites and open-frameworks – structure elucidation and analysis by electron crystallography and X-ray diffraction

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SSZ-26 and SSZ-33: Two Molecular Sieves with Intersecting 10- and 12-Ring Pores

Cited by 171 publications

References 5 publications

Synthesis of Porous Silicates

Synthesis of Porous Silicates

3D Transition Metal Ordering and Rietveld Stacking Fault Quantification in the New Oxychalcogenides La2O2Cu2–4xCd2xSe2

Stacking disorders in zeolites and open-frameworks – structure elucidation and analysis by electron crystallography and X-ray diffraction

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Product

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3D Transition Metal Ordering and Rietveld Stacking Fault Quantification in the New Oxychalcogenides La₂O₂Cu_2–4xCd_2xSe₂