Cone-angle dependence of Ab-initio structure solutions using precession electron diffraction

James Ciston*, Christopher S. Own, Laurence Marks

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Precession electron diffraction (PED) is a technique which is gaining increasing interest due to its ease of use and reduction of the dynamical scattering problem in electron diffraction, leading to more direct structure solutions. We have performed a systematic study of the effect of precession angle for the mineral andalusite on kinematical extinctions and direct methods solutions where the semiangle was varied from 6.5 to 32 mrad in five discrete steps. We show that the intensities of kinematically forbidden reflections decay exponentially as the precession semiangle ((p) is increased and that the amount of information provided by direct methods increases monotonically but non-systematically as cp increases. We have also investigated the zeolite-framework mineral mordenite with PED and have found a direct methods solution where the 12-ring is clearly resolved for the first time.

Original languageEnglish (US)
Title of host publicationElectron Microscopy and Multiscale Modeling - Proceedings of the EMMM-2007 International Conference
Pages53-65
Number of pages13
Volume999
DOIs
StatePublished - May 21 2008
Event1st International Conferrence on Electronic Microscopy and Multi-Scale Modelling, EMMM-2007 - Moscow, Russian Federation
Duration: Sep 3 2007Sep 7 2007

Other

Other1st International Conferrence on Electronic Microscopy and Multi-Scale Modelling, EMMM-2007
CountryRussian Federation
CityMoscow
Period9/3/079/7/07

Keywords

  • Bulk charge density
  • Kinematical extinction; multislice simulation
  • Precession electron diffraction

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Cone-angle dependence of Ab-initio structure solutions using precession electron diffraction'. Together they form a unique fingerprint.

Cite this