TY  - JOUR
A1  - Nolze, Gert
A1  - Tokarski, Tomasz
A1  - Rychłowski, Łukasz
T1  - Use of electron backscatter diffraction patterns to determine the crystal lattice. Part 1. Where is the Bragg angle?
Y1  - 2023-02-24
VL  - 56
IS  - 2
SP  - 349
EP  - 360
JF  - Journal of Applied Crystallography
DO  - 10.1107/S1600576723000134
PB  - International Union of Crystallography
N2  - The derivation of a crystal structure and its phase‐specific parameters from a single wide‐angle backscattered Kikuchi diffraction pattern requires reliable extraction of the Bragg angles. By means of the first derivative of the lattice profile, an attempt is made to determine fully automatically and reproducibly the band widths in simulated Kikuchi patterns. Even under such ideal conditions (projection centre, wavelength and lattice plane traces are perfectly known), this leads to a lattice parameter distribution whose mean shows a linear offset that correlates with the mean atomic number Z of the pattern‐forming phase. The consideration of as many Kikuchi bands as possible reduces the errors that typically occur if only a single band is analysed. On the other hand, the width of the resulting distribution is such that higher image resolution of diffraction patterns, employing longer wavelengths to produce wider bands or the use of higher interference orders is less advantageous than commonly assumed.
N2  - The lattice parameters of more than 350 phases have been determined from simulated backscatter Kikuchi patterns. The deviations correlating with the mean atomic number correspond to those observed previously for experimental electron backscatter diffraction patterns.
UR  - http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/10865
ER  -