1. Department of Physics, Faculty of Science Taibah University Al‐Madina al Munawarah Saudi Arabia
2. Department of Physics, Facult'e des Sciences Universit'e Moulay Ismail Meknes Morocco
3. National Research Centre, Inorganic Chemistry Division and Mineral Resources Refractories and Ceramics Department Cairo Egypt
4. Department of Physics, Faculty of Science Ain Shams University Cairo Egypt