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International Year of Crystallography

International Union of Crystallography
Commission on Mathematical and Theoretical Crystallography

European Crystallographic Association Association Tunisienne de Cristallographie Ministère Tunisien de l'Enseignement Supérieur et de la Recherche Scientifique International Centre for Diffraction Data

School on Fundamental Crystallography

Mahdia, Tunisia, 9-13 April 2012

Organized by the Commission on Mathematical and Theoretical Crystallography (MaThCryst) and the Tunisian Crystallographic Association (Association Tunisienne de Cristallographie), in cooperation with the IUCr Commission on Crystallographic Teaching (CT).



The aim of the course is to give a tutorial and practical guide to the crystallographic databases and some of the computer tools available on the Bilbao Crystallographic Server (www.cryst.ehu.es). Online exercises will help the participants to get some practical experience in the use and applications of the computer programs in treating problems of theoretical crystallography, solid-state physics and crystal chemistry.

  1. Databases and computer tools for group-subgroup relations between space groups
    1. Crystallographic databases and access tools
      1. Space-group symmetry databases (International Tables for Crystallography, Volume A: Space-group symmetry)
      2. Maximal subgroups and minimal supergroups (International Tables for Crystallography, Volume A1: Symmetry relations between space groups)
      3. Brillouin-zone database
    2. Group-subgroup relations between space groups
      1. Study of general group-subgroup pair of space groups; Hermann theorem: twins and antiphase domains; coset decompositions. Supergroups of space groups
      2. Symmetry relations between Wyckoff positions for group-subgroup pairs; Baernighausen trees constructions
    3. Structure utilities and tools
      1. Equivalent structure descriptions; structure descriptions with respect to different space-group settings
      2. Comparison between different descriptions of the same structure
      3. Computer tools for the study of structural relationships
  2. Tools for structural phase transitions on the Bilbao Crystallographic Server
    1. Structural pseudosymmetry
      1. Methods of pseudosymmetry search using supergroups of space groups
      2. Search for new ferroelectric and ferroelastic materials
    2. Phase transitions with group-subgroup relations between the space groups of the two phases
      1. Inverse Landau problem
      2. Symmetry-mode analysis of displacive phase transitions


The official languages of the Schools were English and French. Bilingual tutors helped the participants during the guided exercises.


The School has been held at the Hotel Thalassa.

International Program Committee

Prof. Massimo Nespolo, Nancy (MaThCryst, Chair)
Prof. Mois Ilia Aroyo, Bilbao
Prof. Paola Spadon, Padua (CT)
Prof. Mongi Debabbi, Monastir
Prof. Amor Haddad, Mahdia
Prof. Abdesslem Ben Haj Amara, Bizerte


Prof. Massimo Nespolo, Nancy
Prof. Mois Ilia Aroyo, Bilbao
Prof. Amor Haddad, Mahdia
Prof. Abdesslem Ben Haj Amara, Bizerte

Registration and accommodation

Participants stayed at Hotel Thalassa for 5 nights all inclusive.


(*) Discount for 1-2 children 02 to 12 years, in the same room with parents: 50%
(**) Single room supplement: 15 TND / night.

List of participants

1 Aouaouche Benakoun Algeria
2 Sihem Bofas Algeria
3 Hamza Kherfi Algeria
4 Jade Clarisse France
5 My Rachid Tigha Maroc
6 hassen Agougui Tunisia
7 Wafa Amamou Tunisia
8 Refka Andoulsi Tunisia
9 Hassen Bachoua Tunisia
10 leila Bel Haj hassan Tunisia
11 Youssef Ben Smida Tunisia
12 Zouhour Denden Tunisia
13 Fatma Dhifallah Tunisia
14 Mouna Elghali Tunisia
15 Radouanne Fezei Tunisia
16 Anissa Haj Abdallah Tunisia
17 Wafa Harhouri Tunisia
18 Riadh Marzouki Tunisia
19 moomen marzouki Tunisia
20 Habiba Meskini Tunisia
21 Samia Nasr Tunisia
22 Masseoud Othmani Tunisia
23 Walid Oueslati Tunisia
24 Raoudha Soury Tunisia
25 safa thabet Tunisia
26 Hamza Toumi Tunisia
27 marwa ammar Tunisia
28 Mohamed Oumezzine Tunisia
29 Nabil Fattah Tunisia
30 Salah Othmani Tunisia
31 Abdelwahab Rabhi Tunisia
32 Mahdi Meftah Tunisia
33 Hamdi Trabelsi Tunisia
34 Mongi Debbabi Tunisia
35 Amor Haddad Tunisia
36 Afef Mehri Tunisia
37 Abdelwahab Cheikhrouhou Tunisia


Inquiries about the scientific program of the school should be sent to . For inquiries about organisation please contact .

The Organizers of the Mahdia school have observed the basic policy of non-discrimination and affirms the right and freedom of scientists to associate in international scientific activity without regard to such factors as citizenship, religion, creed, political stance, ethnic origin, race, colour, language, age or sex, in accordance with the Statutes of the International Council for Science. At this school no barriers existed which would have prevented the participation of bona fide scientists.

Last updated: 13 May 2012
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