The Department of Physics, in cooperation with the Continuing Education Unit at the College of Science, held a scientific lecture entitled “Symmetry Relations between Crystal Structures” in the presence of a number of postgraduate students, researchers and those concerned in the field of crystal growth and physics.
The lecture was presented by Prof. Dr. Hussein Khazal Rashid with the aim to link crystal trends with crystal growth properties for electro-optical applications and to review crystalline materials that exist in nature either in the case of single grains or groups, describing that a crystal is a homogeneous solid body bounded by flat surfaces that are formed by natural factors under appropriate conditions of pressure and temperature, while the flat surfaces that define the crystal are known as crystal faces. The lecturer also dealt with symmetry relations that are based on point groups of seven crystal structures that have been studied according to the Schoenflies symbol notation and Hermann-Mauguin notation, stating that the crystal growth of semiconductors is depending on crystal trends taking place according to the Cz and Bregmann methods.
