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International Union of Crystallography
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MaThCryst forthcoming activities
International School on Fundamental Crystallography and Workshop on Rietveld Refinement Analysis (ISFC-2026) February 2026, Rourkela (India)
Fourteenth basic training course on symmetry and group theory, July 2026, Tsukuba (Japan)
MaThCryst recent activities
Thirteenth basic training course on symmetry and group theory, July 2025, Tsukuba (Japan)
MACSMIN 2024 hybrid conference, September 2024, Liverpool (UK)
Seventh MaThCryst School in Latin America, August 2024, Lima (Peru)
Twelth basic training course on symmetry and group theory, July 2024, Tsukuba (Japan)
Third Shanghai International Crystallographic School, June 2024, Shanghai (China)
Eleventh basic and second advanced training course on symmetry and group theory, July 2023, Tsukuba (Japan)
Summer School, June 2023, Nancy (France)
Tenth training course on symmetry and group theory, August 2022, Tsukuba (Japan)
2022 Spring Festival Crystallographic School and Workshop on Crystal-field Applications February 2022, Berijing (China)
Crystallography Online: Workshop on the use and applications of the structural and magnetic tools of the Bilbao Crystallographic Server January 2022, Leioa (Spain)
Mathematics and Computer Science for Materials Innovation, September 2021, online
Ninth training course on symmetry and group theory, September 2021, Tsukuba (Japan)
2021 SIAM Conference on Mathematical Aspects of Materials Science, May 2021, Bilbao (Spain)
More...
Chirality and achirality in crystallography
by H. D. Flack (1943-2017), Laboratoire de Cristallographie, Université de Genève, Switzerland.Participants at the school were provided with a colour printout of the slides used. These can not be reproduced here because some of the material is copyright. However in the following publications, one can find all of the necessary information:
Chiral and Achiral Crystal Structures. H. D. Flack (2003). Helvetica Chimica Acta 86, 905-921. [ E-Reprint Copyright © Helvetica Chimica Acta]
Absolute structure and absolute configuration. H. D. Flack and G. Bernardinelli (1999). Acta Cryst. A55, 908-915. [ E-Reprint Copyright © International Union of Crystallography ]
Reporting and evaluating absolute-structure and absolute-configuration determinations. H. D. Flack and G. Bernardinelli (2000). J. Appl. Cryst. 33, 1143-1148. [ E-Reprint and Supplementary Material Copyright © International Union of Crystallography]
The Mirror of Galadriel: looking at chiral and achiral crystal structures. H. D. Flack and G. Bernardinelli (2003). Crystal Engineering, 6, 213-223. [E-Reprint Copyright © 2004 Elsevier Ltd.]
Anti-wurtzite reoriented. M. Hostettler and H. D. Flack (2003). Acta Cryst. B59, 537 - 538. [E-Reprint Copyright © International Union of Crystallography]
Exercises
Participants were provided with printed copies of the following five papers and asked to comment on them. For reasons of copyright the articles themselves can not be copied here but stable links by way of DOI's are provided.L-Valinium hydrogenphosphite. L. Bendheif, N. Benali-Cherif, L. Benguedouar, K. Bouchouit and H. Merazig (2003). Acta Cryst. E59, o141 - o142.
Absolute Configuration of (+)-α-Dihydrotetrabenazine, an Active Metabolite of Tetrabenazine. M. R. Kilbourn, L. C. Lee, M. J. Heeg, and D. M. Jewett (1997). Chirality 9, 59 – 62.
Mn1-xFexS, x ~ 0.05, an example of an anti-wurtzite structure. L. Eriksson and M. P. Kalinowski (2001). Acta Cryst. E57, i92 - i93.
(Rs )-4-p-Toluenesulfinylcyclohexa-l,4-dienecarboxylic Acid Ethyl Ester. R. Retoux, J. Molenkamp, E. Bonfand P. Gosselin and C. Maignan (1996). Acta Cryst. C52, 2290 - 2292.
The ‘absolute structure’ of dimethyldiphenylphosphonium iodide. F, Dornhaus, H.-W. Lerner and M. Bolte (2005). Acta Cryst. E61, o1657 – o1658.
The participants worked in small groups and it was encouraging to see that was a good deal of interaction between people with training in chemistry, physics, mathematics and materials science. All of these papers have certain negative aspects to them. For a future effort I would include some which would require only positive comments.
4th July 2005
