Дефекти у кристалічних тілах (Defects in Crystalline Solids) Syllabus Lectures: Perfect and Imperfect Crystals. Types of Defect: 0D-Point Defects. Types of Defect: 1D-Line Defects. Types of Defect: 2D-Surface Defects. 3D-Volume Defects. Non-stoichiometric compounds. Defects in the oxides. Structural Defects in Graphene.