In Fig. 3(a) and (b) the XRD and FT-IR spectra of HA
scaffold are shown. From XRD analysis it is clear that (i)
the powder is thermally stable till 1300 1C, (ii) no second-
ary phases form and (iii) the crystallinity reaches 94%.
From the FTIR spectrum, the absorption bands at wave
numbers 1090, 1027 and 960 cmÀ1are associated with the
characteristic of POÀ3 group, whereas, band at 3572 cmÀ1
shows the characteristic stretching mode for OHÀ