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Diffractometry of closely superimposed twins and clusters: a method and a program for establishing UB matrices of single‐crystal individuals
Author(s) -
Tichý K.,
Beneš J.
Publication year - 1979
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/s0021889879011675
Subject(s) - diffractometer , reciprocal , crystallography , matrix (chemical analysis) , diffraction , sample (material) , crystal (programming language) , single crystal , materials science , crystal structure , computer science , physics , chemistry , optics , thermodynamics , philosophy , linguistics , programming language , composite material
The diffractometer measurement of twinned and clustered crystals requires an accurate knowledge of Q i = U i B i matrices of single‐crystal individuals contained in the sample. A determination of the Q i matrix is best done from several accurately centered orienting reflections diffracted by the i th single‐crystal individual. The assignment of the orienting reflections to the individuals is easy for well resolved reciprocal lattices; for closely superimposed ones a method is presented which facilitates this assignment.