A New Method for Fabrication of Nanohydroxyapatite and TCP from the Sea Snail Cerithium vulgatum

Figure 6

X-ray diffractograms of the produced powders after calcination for 4 h in air: (a) powder B (Ca/P = 1.5, 400°C); (b) powder A (Ca/P = 1.667, 800°C).