Accurate structure determination of a borosilicate zeolite EMM-26 with two-dimensional 10 × 10 ring channels using rotation electron diffraction

2016 ◽  
Vol 3 (11) ◽  
pp. 1444-1448 ◽  
Author(s):  
Peng Guo ◽  
Karl Strohmaier ◽  
Hilda Vroman ◽  
Mobae Afeworki ◽  
Peter I. Ravikovitch ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Electron Diffraction Data ◽  
Two Dimensional ◽  
Zeolite Structure

A novel borosilicate zeolite structure was solved from rotation electron diffraction data and preferential boron positions could also be identified.

scholarly journals Procedure and Computer Programs for the Structure Determination of Gaseous Molecules from Electron Diffraction Data.

1969 ◽  
Vol 23 ◽  
pp. 3224-3234 ◽  
Author(s):  
B. Andersen ◽  
H. M. Seip ◽  
T. G. Strand ◽  
R. Stølevik ◽  
Gunner Borch ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Computer Programs ◽  
Electron Diffraction Data

STRUCTURE DETERMINATION OF THE Ge(111)-(3×1)Ag SURFACE RECONSTRUCTION

1999 ◽  
Vol 06 (06) ◽  
pp. 1061-1065 ◽  
Author(s):  
D. GROZEA ◽  
E. BENGU ◽  
C. COLLAZO-DAVILA ◽  
L. D. MARKS
Keyword(s):  
Electron Diffraction ◽  
Surface Reconstruction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Heavy Atom ◽  
Direct Methods ◽  
Electron Diffraction Data ◽  
Transmission Electron ◽  
First Time

For the first time, during the investigation of the Ag submonolayer on the Ge(111) system, large, independent domains of the Ge (111)-(3×1) Ag phase were imaged and investigated. Previous studies have reported it only as small insets between Ge (111)-(4×4) Ag and Ge (111)- c (2×8) domains. The transmission electron diffraction data were analyzed using a Direct Methods approach and "heavy-atom holography," with the result of an atomic model of the structure similar to that of Ge (111)-(3×1) Ag .

Ab initio structure determination of interlayer expanded zeolites by single crystal rotation electron diffraction

2014 ◽  
Vol 43 (27) ◽  
pp. 10593-10601 ◽  
Author(s):  
Peng Guo ◽  
Leifeng Liu ◽  
Yifeng Yun ◽  
Jie Su ◽  
Wei Wan ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Single Crystal ◽  
Ab Initio ◽  
Diffraction Data ◽  
Structure Determination ◽  
Electron Diffraction Data ◽  
Crystal Rotation ◽  
Ab Initio Structure ◽  
Crystal Electron

Rotation electron diffraction (RED) combines the beam tilt and goniometer tilt to obtain single crystal electron diffraction data, which has been used forab initiostructure determination of interlayer expanded zeolites.

scholarly journals Direct‐Space Structure Determination of Covalent Organic Frameworks from 3D Electron Diffraction Data

2020 ◽  
Vol 132 (50) ◽  
pp. 22827-22833
Author(s):  
Tu Sun ◽  
Colan E. Hughes ◽  
Linshuo Guo ◽  
Lei Wei ◽  
Kenneth D. M. Harris ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Space Structure ◽  
Electron Diffraction Data ◽  
Covalent Organic Frameworks ◽  
3D Electron

scholarly journals Direct‐Space Structure Determination of Covalent Organic Frameworks from 3D Electron Diffraction Data

2020 ◽  
Vol 59 (50) ◽  
pp. 22638-22644
Author(s):  
Tu Sun ◽  
Colan E. Hughes ◽  
Linshuo Guo ◽  
Lei Wei ◽  
Kenneth D. M. Harris ◽  
...  
Keyword(s):  
Electron Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Space Structure ◽  
Electron Diffraction Data ◽  
Covalent Organic Frameworks ◽  
3D Electron

Crystal Structure Determination of Glycerol-Containing Lipids from Electron Diffraction Data. Use of Analog Compounds Based upon Configurational Isomers of Cyclopentane-1, 2, 3-TRIOL

1977 ◽  
Vol 35 ◽  
pp. 24-25
Author(s):  
Douglas L. Dorset ◽  
Anthony J. Hancock
Keyword(s):  
Crystal Structure ◽  
Electron Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Crystal Surface ◽  
Coherent Scattering ◽  
Crystal Structure Determination ◽  
Electron Diffraction Data ◽  
Polar Group ◽  
Axis Orientation

Lipids containing long polymethylene chains were among the first compounds subjected to electron diffraction structure analysis. It was only recently realized, however, that various distortions of thin lipid microcrystal plates, e.g. bends, polar group and methyl end plane disorders, etc. (1-3), restrict coherent scattering to the methylene subcell alone, particularly if undistorted molecular layers have well-defined end planes. Thus, ab initio crystal structure determination on a given single uncharacterized natural lipid using electron diffraction data can only hope to identify the subcell packing and the chain axis orientation with respect to the crystal surface. In lipids based on glycerol, for example, conformations of long chains and polar groups about the C-C bonds of this moiety still would remain unknown.One possible means of surmounting this difficulty is to investigate structural analogs of the material of interest in conjunction with the natural compound itself. Suitable analogs to the glycerol lipids are compounds based on the three configurational isomers of cyclopentane-1,2,3-triol shown in Fig. 1, in which three rotameric forms of the natural glycerol derivatives are fixed by the ring structure (4-7).

The use of Direct Phasing Methods for Single Crystal Electron Diffraction Data. I. Methylene Subcells

1976 ◽  
Vol 34 ◽  
pp. 544-545
Author(s):  
D. L. Dorset ◽  
H. A. Hauptman
Keyword(s):  
Crystal Structure ◽  
Electron Diffraction ◽  
Diffraction Data ◽  
Crystal Structure Analysis ◽  
Electron Diffraction Data ◽  
Trial And Error ◽  
Mosaic Crystals ◽  
Crystal Electron ◽  
Kinematical Theory

The significant impediment to the use of electron diffraction data for crystal structure analysis is, of course, the perturbation of n-beam dynamical effects. In more severe cases this dynamical perturbation gives an intensity distribution in the diffraction pattern which is not directly related to the underlying crystal structure, thus making the determination of complex structures nearly impossible by this technique.However, as was experimentally established in Vainshtein's laboratory and is theoretically predicted, the diffraction of electrons from thin mosaic crystals composed of light atoms is in accord with kinematical theory to a good first approximation and, furthermore, ab initiocrystal structure analyses are tractable viastandard crystallographic phase determination. To date the few electronographic determinations of unknown organic structures have used either trial and error or Patterson techniques.

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