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X‐ray extinction contrast in deformed single crystals
Author(s) -
Fries E.,
Spendel M.,
Philibert J.
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/s0021889881009394
Subject(s) - extinction (optical mineralogy) , contrast (vision) , dislocation , transmission electron microscopy , burgers vector , optics , crystallography , single crystal , distribution (mathematics) , physics , transmission (telecommunications) , scale (ratio) , materials science , condensed matter physics , chemistry , mathematics , mathematical analysis , computer science , quantum mechanics , telecommunications
Berg–Barrett topography gives information on large‐scale dislocation distribution in deformed single crystals. The Burgers vectors are determined by disappearance of the dark `extinction contrast'. This contrast cannot be extinguished by any single diffracting condition when different types of non‐coplanar Burgers vectors are present simultaneously; complementary information by electron transmission microscopy agrees well with this inference. These general remarks are illustrated by some examples on deformed single crystals of α‐Al 2 O 3 , (Al 2 O 3 ) 1.8 MgO, NaCl and Cu 2 O.
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