The phase composition of the HAp powders was determined using a Bruker-AXS D8 DAVINCI diffractometer equipped with Bragg-Brentano geometry and CuKα radiation. The XRD patterns were recorded from 5 to 120° in a 2θ scale with a step of 0.01° and a scan speed of 2 s per step. The crystalline phases were identified using the Crystallography Open Database (COD) and the DIFFRACplus EVA-SEARCH software.