view article
Figure 2
A diffraction study of representative structures. The projection distance is 13.5 m and the chosen fraction of reciprocal space measures 30 cm. (a, left) A real-space structure of two adjacent discs. (a, right) A photograph of the corresponding Airy pattern with horizontal knots in reciprocal space. (b, left) A two-dimensional orthorhombic real-space crystal structure. (b, right) A photograph of the corresponding reciprocal space. (c, left) The same real-space structure as in panel (b), but with uncorrelated displacive disorder. (c, right) A photograph of the corresponding reciprocal space. Note the large-angle diffuse scattering compared with panel (b). (d, left) An electron microscopy image of quasi-crystalline Al71Ni24Fe5 found in the Khatyrka meteorite (Bindi et al., 2015BB2). (d, right) A photograph of the corresponding reciprocal space, clearly showing a `forbidden' tenfold symmetry.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 52| Part 2| April 2019| Pages 457-462
https://doi.org/10.1107/S1600576719001948
Follow J. Appl. Cryst.
Sign up for e-alerts
E-alerts
Follow J. Appl. Cryst. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS