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December 2022

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iUCR Melbourne 2023: session on Multigrain Crystallography, Multicrystal Indexings, and Microstructures in High Pressure Experiments
by Nancy Lazarz 20 Dec '22

20 Dec '22

________________________________ Hello all, The 26th Congress and General Assembly of the International Union of Crystallography Congress 2023 will be held in Melbourne, 22-20 August 2023. Meeting website: https://iucr2023.org/<https://urldefense.com/v3/__https:/emea01.safelinks.protection.outlook.com/…> Abstract Deadline: 21 February 2023 Early bird registration deadline: 31 March 2023 The Commissions on Diffraction Microstructure Imaging and High Pressure invite you to submit abstracts to the following session: A030 Multigrain Crystallography, Multicrystal Indexings, and Microstructures in High Pressure Experiments This session is meant to catalyze discussions between the high pressure community and the newly registered IUCr Commission on Diffraction Microstructure Imaging, which aims at developing standards, procedures, trainings, etc on techniques such as multigrain crystallography, 3D-XRD, or High Energy X-ray Diffraction Microscopy (HEDM). Please join us in Melbourne for exciting discussions! Happy Holidays, S. Merkel and Stella Chariton More information on the topic The iUCR Commission on Diffraction Microstructure Imaging: https://www.iucr.org/resources/commissions/diffraction-microstructure-imagi…<https://urldefense.com/v3/__https:/emea01.safelinks.protection.outlook.com/…> The newly created discussion board for DMI: https://github.com/dmi-3D/dmi-3D.github.io/discussions<https://urldefense.com/v3/__https:/emea01.safelinks.protection.outlook.com/…> The full session abstract Over the last 50 years, high pressure research allowed for discoveries in multiple fields of science, with applications ranging from earth science and planetology, condensed matter physics, to the synthesis of new materials. Samples in high pressure devices often appear in the form of a multiphase and multicrystal assemblage within a micro-focused x-ray beam. Such samples fall in between the ideal single-crystal and powder and are inappropriate for conventional crystallographic characterization. In addition, sample microstructures need to be characterized and this requires mapping the orientations and properties of hundreds of individual grains simultaneously. Recently, new multigrain crystallography and multi-crystal indexing techniques emerged. Both have now been successfully applied to characterize the crystal structures of complex multigrain, multi-phase samples at extreme conditions, as well as to track the hundreds of microstructural elements of materials undergoing processes such as phase transformation and plastic deformation. Despite significant advances, however, these experiments and the processing of such data remain a technical challenge. Nevertheless, these methods offer great avenues for discoveries in high pressure research. With new updated synchrotron sources, studies of materials under multi-megabar pressures will expand and these materials will require investigating multiple crystals simultaneously. In parallel, multigrain crystallography allows, for instance, for a new approach in the study of phase transformations, the induced microstructures, and the associated mechanisms. Finally, the high-pressure community has developed a great expertise at solving crystal structures under complex environments, and this could cross-feed into the multigrain crystallography community and other fields of science. This microsymposium aims at bringing together those addressing multicrystal indexings, characterization of new structures and microstructural studies using multigrain crystallography under pressure. We will highlight the latest technical and scientific discoveries and how the methods could be developed and opened towards a broader community. -- Sébastien Merkel Université de Lille, France http://merkel.texture.rocks/<https://urldefense.com/v3/__https:/emea01.safelinks.protection.outlook.com/…>

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