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Identification of α‐Alumina Surface Structures by Electron Diffraction
Author(s) -
Susnitzky David W.,
Carter C. B.
Publication year - 1986
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1986.tb07484.x
Subject(s) - transmission electron microscopy , electron diffraction , diffraction , crystallography , materials science , crystal (programming language) , crystal structure , electron microscope , x ray crystallography , surface (topology) , optics , chemistry , physics , nanotechnology , geometry , mathematics , computer science , programming language
Single‐crystal thin foils of a‐alumina were annealed i:i air and examined by transmission electron microscopy. Weak reflections, which are kinematically forbidden for the a‐alumina unit cell, were obscrxed in selected‐area diffraction patterns obtained from foils prepared parallel to (0001), (1012), and (1120) planes. These reflections are interpreted as giving evidence for surface periodicities which differ from those expected for the simple termination of the bulk crystal.