1. Institute of High Pressure Physics Polish Academy of Sciences Warsaw Poland
2. Faculty of Materials Science and Engineering Warsaw University of Technology Warsaw Poland
3. Lebniz Institute for Crystal Growth Berlin Germany
4. Equipe de Cristallographie et de Simulation des Matériaux, Laboratoire de Physico‐Chimie des Matériaux et Catalyse, Faculté des Sciences Exactes Université de Bejaia Bejaia Algeria