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High‐voltage, high‐resolution electron microscopy of Au–Cd alloys. II. Double hexagonal long‐period superstructures
Author(s) -
Shindo D.,
Hiraga K.,
Hirabayashi M.
Publication year - 1981
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889881009084
Subject(s) - stacking , electron microscope , hexagonal crystal system , materials science , crystallography , resolution (logic) , cathode ray , period (music) , electron , molecular physics , chemistry , optics , physics , organic chemistry , quantum mechanics , artificial intelligence , computer science , acoustics
Ordered structures of Au 3 Cd with a double hexagonal stacking sequence (4 H ) have been investigated by 1 MV electron microscopy in combination with many‐beam dynamical calculations. One‐ and two‐dimensional long‐period superstructures (LPS) were observed at atomic level by high‐resolution images with [001] incidence. The two‐dimensional LPS was determined to be isomorphic with the Au 77 Mg 23 structure. Two‐dimensional LPS with stacking sequences 6 H and 9 R were also found in the composition range 24–31 at.%Cd.