International Tables for Crystallography, Volume A, Space-group symmetry. 6th edition. Edited by Mois I. Aroyo. Wiley, 2016. Pp. xxi + 873. Price GBP 295.00, EUR 354.00 (hardcover). ISBN 978-0-470-97423-0.

Electrosynthesis of Quasi-Epitaxial Crystals on Liquid Metals

“…Additional peaks appeared at 2θ = 19.4, 27.6, 32.2, 35.9, 39.5, 41.1, 44.3, and 55.0° indexed to the (110), (200), (121), (004), (220), (114), (310), and (006) planes, respectively. Although the (001) diffraction signal was not visible in the tetragonal lattice because of the 2 1 screw axis in this lattice type, the observation of the dominant (002) signal was consistent with the [001] direction as normal to the liquid metal surface plane since they belong to the same family of directions. The appearance of other directions in Figure b as minor peaks was attributed to the difficulty in obtaining frozen liquid metal surfaces with absolutely no curvature.…”

Teaching Edition of International Tables for Crystallography: Crystallographic symmetry. Edited by Mois I. Aroyo. IUCr/Wiley, 2021. Softcover, pp. xii + 236. ISBN 978-0-470-97422-3. Price GBP 29.99.

“…Four examples of derivation of the space group from the analysis of the diffraction pattern are worked out with enough details to provide the reader with a clear idea of how the procedure works. Particularly welcome is the reintroduction of the diffraction symbol, whose disappearance from Volume A I had criticized in my review (Nespolo, 2017). Its name has been changed from extinction symbol in the previous editions to diffraction symbol, which is definitely more appropriate, extinction being a physical phenomenon completely different to the one leading to the reflection conditions.…”