[1] Dept. of Physics, Faculty of Arts and Sciences, Ondokuz Mayis University, Kurupelit, 55139- Samsun, Turkey
[2] Dept. of Pharmaceutical Chemistry, Faculty of Pharmacy, Hacettepe University, 06100-Ankara, Turkey
[3] X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia