Introductory of Scherrer’s Equation in Laminated Plate-Shaped Hexagonal Hydroxyapatite Nanocrystals System
Shiv Prakash Mishra *
Department of Physics and Electronics, Dr. Ram Manohar Lohia Avadh University, Ayodhya-224001, U.P., India.
*Author to whom correspondence should be addressed.
Abstract
Since, hydroxyapatite (HAP) crystal system is hexagonal and its crystalline size in the longitudinal directions of various (a,b,c) axes, which are depending on the thickness of the laminated plate-shaped HAP crystals. Hence, by applying of Scherrer’s equation D100 = Kλ / (β cos ) we calculated their crystallite size as perpendicular to the (100) plane as well as to comparing the thickness of synthesized needle or laminated thin plate shaped HAP nanocrystals of CALPHOS or CONTROL and SUC or Suc-20 samples under hydrothermal condition via organically modified apatite based octacalcium phosphate (OCP) at 180 for 3h. The pH of solution adjusted to 5.5 with incorporating dicarboxylate or succinate ions having Ca/P molar ratio is expected to be 1.56±0.02, where the morphology of OCP are retained. During incorporating of succinate ions in OCP crystals, the hydrogen phosphate (HPO42-) ions in the hydrated layers of OCP are being substituted by succinate ions. These organically modified OCP which generated to HAP with unique nanocrystallite structure have been characterized by using of SEM, FTIR and X-ray diffraction analysis.
Keywords: Hydroxyapatite, octacalcium phosphate, succinate ion