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Double hexagonal close‐packed structure revealed in a single colloidal crystal grain by Bragg rod analysis
Author(s) -
Meijer J.M.,
Shabalin A.,
Dronyak R.,
Yefanov O. M.,
Singer A.,
Kurta R. P.,
Lorenz U.,
Gorobstov O.,
Dzhigaev D.,
Gulden J.,
Byelov D. V.,
Zozulya A. V.,
Sprung M.,
Vartanyants I. A.,
Petukhov A. V.
Publication year - 2014
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/s1600576714010346
Subject(s) - stacking , materials science , bragg peak , diffraction , rod , bragg's law , crystallography , colloidal crystal , crystal (programming language) , spheres , hexagonal crystal system , close packing of equal spheres , crystal structure , x ray crystallography , colloid , optics , chemistry , physics , nuclear magnetic resonance , medicine , beam (structure) , alternative medicine , pathology , astronomy , computer science , programming language
A coherent X‐ray diffraction study of a single colloidal crystal grain composed of silica spheres is reported. The diffraction data contain Bragg peaks and additional features in the form of Bragg rods, which are related to the stacking of the hexagonally close‐packed layers. The profile of the Bragg rod shows distinct intensity modulations which, under the specific experimental conditions used here, are directly related to the stacking sequence of the layers. Using a model for the scattered intensity along the Bragg rod for an exact stacking sequence of a finite number of hexagonally close‐packed layers, it is found that a double hexagonal close‐packed stacking sequence is present in the colloidal crystal grain. This analysis method opens up ways to obtain crucial structural information from finite‐sized crystalline samples by employing advanced third‐generation X‐ray sources.