Hydroxyapatite, Ca5(PO4)3OH was prepared via the reaction of calcium hydroxide with orthophosphoric acid or between calcium nitrate and diammonium hydrogen phosphate at different PH 1 S and temperatures of aging. The crystalline phases were detected by XRD. The molar Ca/P ratio was found to be approximately 1.72. The specific surface areas m2/g were also calculated. The Transmittance Electron Microscope, (TEM) indicate that the hydroxyapatite powder (HA) produced was prismatic in shape with uniform size. The IR spectra of the prepared powder were given. The solubility of the synthesized powder, bulk density in g/cm3, water abrorption % and apparent porosity % were also given. The Scanning Electron Microscope, (SEM) shows the agglometration in the grains and its fine nature.