“…X‐ray diffraction patterns of HA powders treated with 0.01 M, 0.02 M, 0.03 M, 0.04 Mand 0.05 MFeCl 3 solution, respectively are compared with the standard pattern of HA (ICDD‐00‐009‐0432) as shown in Figure 1B. The characteristic peaks of undoped HA obtained at a 2θ values of 25.83°, 28.6°, 31.8°, 32.2°, 33.2° 35.7°, 39.7°, 46.9°, 50.1°, 53.1° and 63.6° are corresponding to (002), (210), (211), (112), (300), (301), (310), (222), (321), (004) and (502) planes respectively, which has been reported in our previous work 9 . Figure 1B also reveals the co‐existence of CaHPO 4 as a biocompatible secondary phase at 2θ values of 26.54° and 30.24° are corresponding to (200) and planes respectively (ICDD: 01‐070‐1425) along with HA 9,41 .…”