Scanning reciprocal space for solving unknown structures: energy filtered diffraction tomography and rotation diffraction tomography methods

2012 ◽  
pp. 121112001030001
Author(s):  
Mauro Gemmi ◽  
Peter Oleynikov
Keyword(s):  
Reciprocal Space ◽  
Diffraction Tomography

Electron Diffraction Reinvestigation of CdCr2Se4 and ZnCr2-xVxSe4 Spinel Structures

2013 ◽  
Vol 203-204 ◽  
pp. 262-265
Author(s):  
Maciej Zubko ◽  
Joanna Wspaniała ◽  
Danuta Stróż ◽  
Enrico Mugnaioli
Keyword(s):  
Crystal Structure ◽  
Electron Diffraction ◽  
Single Crystals ◽  
Reciprocal Space ◽  
Diffraction Tomography ◽  
Cubic Symmetry ◽  
Space Group ◽  
Tilt Series ◽  
Tomography Method ◽  
Spinel Structures

Crystal structure of two spinel single crystals CdCr2Se4 and ZnCr2-xVxSe4 have been reinvestigated using automated electron diffraction tomography method with beam precession. 3D reciprocal space have been reconstructed base on recorded tilt series. For both samples crystal structure was refined and the cubic symmetry with space group Fd-3m was confirmed. No additional electron potential has been located beside occupied atom sites.

Calculation of structure images of crystalline defects

1978 ◽  
Vol 36 (1) ◽  
pp. 282-283
Author(s):  
M.A. O'Keefe ◽  
Sumio Iijima
Keyword(s):  
Diffuse Scattering ◽  
Computing Time ◽  
Continuous Distribution ◽  
Sampling Interval ◽  
Reciprocal Space ◽  
Objective Lens ◽  
Lattice Images ◽  
Slice Method ◽  
Space Cell ◽  
Beam Lattice

We have extended the multi-slice method of computating many-beam lattice images of perfect crystals to calculations for imperfect crystals using the artificial superlattice approach. Electron waves scattered from faulted regions of crystals are distributed continuously in reciprocal space, and all these waves interact dynamically with each other to give diffuse scattering patterns.In the computation, this continuous distribution can be sampled only at a finite number of regularly spaced points in reciprocal space, and thus finer sampling gives an improved approximation. The larger cell also allows us to defocus the objective lens further before adjacent defect images overlap, producing spurious computational Fourier images. However, smaller cells allow us to sample the direct space cell more finely; since the two-dimensional arrays in our program are limited to 128X128 and the sampling interval shoud be less than 1/2Å (and preferably only 1/4Å), superlattice sizes are limited to 40 to 60Å. Apart from finding a compromis superlattice cell size, computing time must be conserved.

Development of a novel apparatus for experiments in soft X-ray diffraction imaging and diffraction tomography

2003 ◽  
Vol 104 ◽  
pp. 27-30 ◽  
Author(s):  
T. Beetz ◽  
C. Jacobsen ◽  
C.-C. Kao ◽  
J. Kirz ◽  
O. Mentes ◽  
...  
Keyword(s):  
Diffraction Tomography ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Imaging

Time-resolved X-ray reciprocal space mapping of the crystal under external electric field

2018 ◽  
Vol 189 (02) ◽  
pp. 187-194 ◽  
Author(s):  
Nikita V. Marchenkov ◽  
Anton G. Kulikov ◽  
Ivan I. Atknin ◽  
Arsen A. Petrenko ◽  
Alexander E. Blagov ◽  
...  
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Space Mapping ◽  
Reciprocal Space ◽  
Reciprocal Space Mapping ◽  
Time Resolved ◽  
X Ray

Ab initio structure determination of cytochrome c6 by combined reciprocal space-real space approach

2003 ◽  
Vol 218 (1) ◽  
Author(s):  
K. Chowdhury ◽  
S. Ghosh ◽  
M. Mukherjee
Keyword(s):  
Cytochrome C ◽  
Ab Initio ◽  
Structure Determination ◽  
Direct Method ◽  
Real Space ◽  
Reciprocal Space ◽  
Cytochrome C6 ◽  
Ab Initio Structure ◽  
Space Approach

AbstractThe direct method program SAYTAN has been applied successfully to redetermine the structure of cytochrome c

Debye equation versus Whole Powder Pattern Modelling: Real versus reciprocal space modelling of nanomaterials

2009 ◽  
Vol 2009 (30) ◽  
pp. 85-90 ◽  
Author(s):  
K. Beyerlein ◽  
A. Cervellino ◽  
M. Leoni ◽  
R. L. Snyder ◽  
P. Scardi
Keyword(s):  
Reciprocal Space ◽  
Powder Pattern ◽  
Equation Versus ◽  
Debye Equation
Sign in / Sign up

Export Citation Format

Share Document