Crystal Structure Analysis of LaCrO3 System I. Space Group Determination by Convergent-Beam Electron Diffraction
نویسندگان
چکیده
منابع مشابه
Convergent beam electron diffraction
In convergent-beam electron diffraction (CBED) a highly convergent electron beam is focussed on to a small (~< 50 nm) area of the sample. Instead of the diffraction spots that are obtained in the back focal plane of the objective lens with parallel illumination in conventional selected-area electron diffraction, CBED produces discs of intensity. The point group can be determined uniquely from t...
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The development of new materials requires an understanding of their mode of growth and the nature of defects, interfaces and strains thereby incorporated. This paper shows how convergent beam electron diffraction (CBED) and large angle CBED (LACBED) can be used to analyse such problems. It is shown how CBED and LACBED can give two-beam rocking curves, which can be used to profile plane rotation...
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The purpose of this article is to present a practical guide to the identification of phases in the analytical electron microscope with the aid of convergent beam electron diffraction. There is included a step-by-step approach to phase analysis, from the possible choices of the form of the specimen through how to explore reciprocal space in order to perform a full phase identification, either by...
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The electron density difference map, ∆ρ(r)= ρ(r)Cryst ρ(r)IAM, here defined as the difference between the electron density of a crystal, ρ(r)Cryst, and that of the equivalent independent atom model (IAM), ρ(r)IAM, represents one of the quantum mechanical characteristics central for developing fundamental understanding of materials. Convergent beam electron diffraction (CBED) experiments perform...
متن کاملApplication of convergent-beam electron diffraction to the determination of grain boundary structures
Convergent-beam electron diffraction (CBED) has been applied in grain boundary structure determination, both for horizontal and vertical boundaries in thin specimens. First the relation between bicrystal symmetry and CBED pattern symmetry is developed for the two types of boundaries. These results are subsequently employed for a structure determination of twin boundaries in Au and Si. The CBED ...
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ژورنال
عنوان ژورنال: ECS Proceedings Volumes
سال: 1999
ISSN: 0161-6374,2576-1579
DOI: 10.1149/199919.0649pv