The Workshop provides the theoretical background of the superspace theory for structural analysis of incommensurately modulated crystals. Participants will practice structural analysis in superspace with the computer programs Superflip and JANA2006.

The targeted audience for this school is a non-specialist one: PhD students, young or experienced scientists working in the field of crystallography, chemistry, material science or solid state physics who want to have a basic understanding of aperiodic crystals are encouraged to apply.

The number of participants is limited to 40. Tutorials in small groups will be organised in order to practice the content learned in the lecture courses.Â

Registration deadline: 15th June 2019

Registration costs vary according to career stage of the applicants. The registration fees are all inclusive, and hence cover the cost of accommodation and meals for the entirety of the school. Please visit the school website for more information and the specific registration costs.

Translational Symmetry and Reciprocal Space â€" Mike Glazer, Oxford

Phonons and the Theory of Soft Mode Phase transitions â€" Martin Dove, QMUL

Irreducible Representation Analysis â€" Mark Senn, Warwick

Landau Theory  â€" Michael Carpenter, Cambridge

Modulated Crystal Structures and 3d+n space groups â€" John Claridge, Liverpool

This workshop will provide an overview of the methods of structural analysis of incommensurately modulated crystals and composite crystals.Â

Lectures will cover the basic principles of the superspace approach as well as recent developments on modulation functions and structure solution.Â

Participants will have the opportunity to practice structural analysis in superspace with the computer programs Superflip and JANA2006.Â

A step-by-step tutorial will guide you through structure determination, symmetry analysis, structure refinement and t-plots for crystal-chemical analysis of selected examples of modulated structures and composite crystals.

Organisation: German Association for Crystallography (DGK)Â

Local Organisation: Sander van Smaalen and Andreas Schönleber. Email: smash@uni-bayreuth.de

In this workshop you will learn to interpret diffuse scattering and to simulate disordered crystal structures.Â

Defects are quite common in crystals and are responsible for a number of properties like ionic conductivity, electronic properties of indirect semiconductors etc.Â

In diffraction, defects manifest themselves by the presence of diffuse scattering. While its peak intensity usually is weak, the total scattering intensity will be an appreciable fraction of the Bragg intensities.Â

Thus, the description of these structures is largely incomplete without proper interpretation of the diffuse scattering.

The workshop covers the techniques to simulate and to refine disordered structures for a wide range of defects, and the corresponding calculation of the diffraction pattern for single crystals and powder, as well as the calculation of the pair distribution function PDF.

For more info please visit:

The 13th International Conference on Quasicrystals (ICQ13) will be held on 18-23 September 2016 in Kathmandu, Nepal. This is one of the series following the 1st workshop in Les Houches, France, the 2nd in Beijing, China, the 3rd Meeting in Vista-Hermosa, Mexico, the 4th Conference in St. Louis, USA, the 5th in Avignon, France, the 6th in Tokyo, Japan, the 7th in Stuttgart, Germany, the 8th in Bangalore, India, the 9th in Ames, USA, the 10th in Zürich, Switzerland, the 11th in Sapporo, Japan, the 12th in Cracow, Poland.

The ICQ13 offers an opportunity for researchers working on quasicrystals and related topics to exchange ideas and encourage collaborations with other research groups, hence promoting material science and engineering. It brings all the best scientists in the world to talk about the recent developments in the field. Abstracts are invited in all areas of research including (but not limited to) the following topics:

• Formation, growth and phase stability
• Structure and modeling
• Mathematics of quasiperiodic and aperiodic structures
• Physical properties: transport, magnetic, dynamical, mechanical etc.
• Surfaces and overlayers
• Applications and New Frontiers
• Metamaterials: polymer, macro molecules, photonic/phononic crystals, oxide etc.
• Related topics: incommensurate/modulated structures, metallic glass, complex metallic alloys, clathrate compound, clusters etc.

Focus Area Contacts

Focus Area 1: Michael Hennig, Basel for SIG 1:

Focus Area 2: Jürg Schefer, Paul Scherrer Institute Villigen, for SIG 5, 11, 12

Focus Area 3: Piero Macchi, Berne, for SIG 2, SIG 3, SIG 4

Focus Area 4: Katharina Fromm, Fribourg, for SIG 7 and SIG 13

Focus Area 5: Radovan Cerny, Geneva, for SIG 6, SIG 8 and SIG 9

Ape­ri­od­ic crys­tals are long range or­dered struc­tures which lack trans­la­tion­al in­vari­ance. They are found in a large va­ri­ety of sys­tems (min­er­als, or­gan­ic com­pounds, sin­gle el­e­ment un­der pres­sure, ox­ides, fer­ro-electrics, in­ter­metal­lic com­pounds) and en­com­pass in­com­men­su­rate­ly mod­u­lat­ed struc­tures, in­com­men­su­rate com­pos­ites and qua­sicrys­tals.

The struc­ture de­ter­mi­na­tion of ape­ri­od­ic crys­tals and the in­flu­ence of the ape­ri­od­ic or­der on their phys­i­cal prop­er­ties have made tremen­dous progress in re­cent years. How­ev­er the high di­men­sion­al de­scrip­tion and su­per­space ap­proach used to de­scribe the atom­ic struc­ture of ape­ri­od­ic crys­tal re­mains dif­fi­cult to grasp for the non-spe­cial­ist.

In this school the basics of the analysis of aperiodic crystals will be explained for a non-specialist tar­get­ au­di­ence, i.e. Phd stu­dents or ex­pe­ri­enced sci­en­tists work­ing in the field of crys­tal­log­ra­phy, chem­istry, ma­te­ri­al sci­ence or sol­id state physic and will­ing to have a ba­sic un­der­stand­ing of ape­ri­od­ic crys­tals.

This is a joint Antwerp Summer University School and C-MAC Euroschool.

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The 8th Workshop on Structural Analysis of Aperiodic Crystals continues a series of workshops on the structure determination of incommensurate crystals at the University of Bayreuth. An overview will be provided of the methods of structural analysis of incommensurately modulated crystals and composite crystals. Lectures will cover the basic principles of the superspace approach as well as recent developments on modulation functions and charge flipping.

Participants will have the opportunity to practice structural analysis in superspace with the computer programs Superflip and JANA2006 (written by V. Petricek, M. Dusek and L. Palatinus, Prague). A step-by-step tutorial will guide you through structure determination, symmetry analysis, structure refinement and t-plots for crystal-chemical analysis of selected examples of modulated structures and composite crystals. Your own data sets will be welcome, too.

The number of participants will be limited to 30.

Lecturers

• Michal Dusek, Prague, Czech Republic
• Lukas Palatinus, Prague, Czech Republic
• Vaclav Petricek, Prague, Czech Repulic
• Andreas Schönleber, Bayreuth, Germany
• Sander van Smaalen, Bayreuth, Germany

Topics

• Aperiodic order of matter
• Superspace theory of modulated crystals
• Symmetry and superspace groups
• Diffraction
• Structure solution and refinement in superspace
• Structural analysis and t-plots
• Crystal chemistry

Tutorials

A practical course on structural analysis of modulated crystals with JANA2006 and Superflip is part of the workshop.

The Eighth Workshop on Structural Analysis of Aperiodic Crystals will take place from 12 to 15 March 2015 at the University of Bayreuth, Germany.

Registration and information at http://aperiodic.uni-bayreuth.de/workshop_2015/

or ask Sander van Smaalen, Email: smash@uni-bayreuth.de

This will be the eighth of a series of events held triennially since the first Aperiodic in Les Diablerets in 1994. The aim of the conference is to bring together scientists dealing with all aspects of aperiodic crystals and related problems. The conference will be hosted in the baroque building of the Brevnov monastery - the first male monastery in Bohemia founded in 993 AD. Despite of the historical origin, the venue offers all the necessary comfort for a successful and pleasant conference.

The venue is situated only about two kilometres from the Prague castle and about 20 minutes by tram from the famous historical city centre of Prague. Being considered by many one of the most beautiful cities in the world, we believe that the participants will enjoy not only the scientific programme, but also the opportunity to explore the magic and beauty of this city in the heart of Europe.

APERIODIC 2012Â

The XXII Conference on Applied Crystallography

Aperiodic crystals are long range ordered structures which lack translational invariance. They are found in a large variety of systems (minerals, organic compounds, single element under pressure, oxides, ferro-electrics, intermetallic compounds) and encompass incommensurately modulated structures, incommensurate composites and quasicrystals.Â

The structure determination of aperiodic crystals and the influence of the aperiodic order on their physical properties have made tremendous progress in recent years. However the high dimensional description and superspace approach used to describe the atomic structure of aperiodic crystal remains difficult to grasp for the non specialist.Â

This is why the Commission on Aperiodic Crystals and the Commission on Teaching Crystallography of the International Union of Crystallography (IUCr) have decided to organize a school on Aperiodic Crystals.Â

The targeted audience is clearly a non-specialist one: Phd students or experienced scientists working in the field of crystallography, chemistry, material science or solid state physic and willing to have a basic understanding of aperiodic crystals.Â

The school will be organized on 5 days in Carqueiranne, south of France. Experts in the field of aperiodic crystal will give lectures, in a tutorial way and on a step by step basis. The number of participants will be limited to 65 in order to facilitate exchanges.Â

After an introduction to the high dimensional concept on simple 1D or 2D toy model examples, the basis of the structure determination of aperiodic crystal will be introduced for each class of aperiodic crystals. Various examples will then be presented, together with overviews on phase transitions, phonon and phasons, simulations and aperiodic crystal stability.Â

School location

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