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Irradiation‐induced defects in β'ppp‐alumina examined by high‐resolution electron microscopy
Author(s) -
Matsui Y.
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/s0021889881008637
Subject(s) - spinel , lamella (surface anatomy) , electron microscope , crystallography , irradiation , materials science , electron , oxygen , resolution (logic) , electron beam processing , mineralogy , chemistry , optics , composite material , physics , metallurgy , organic chemistry , quantum mechanics , artificial intelligence , computer science , nuclear physics
Electron‐induced defects in β ′′′′‐alumina, Na 2 O.3MgO.7Al 2 O 3 , are examined by high resolution electron microscopy. The phenomena can be reasonably explained in the same manner as previously done for a similar case in β ′′′′‐alumina [Matsui & Horiuchi (1981). Acta Cryst. A 37 , 51–61]; two spinel‐like blocks (each having six oxygen layers) on both sides of the lost conduction plane are directly combined to form cubic close packing of twelve oxygen layers through the minimum shift vectors. The arrangements of cations in a resultant defect block are slightly different from those in the spinel lamella of the same thickness.