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Figure 1. XRD patterns of reaction products of unground TTCP and ncTTCP ground for 1 hr, 4 hrs, and 24 hrs mixed with 2.5% Na2HPO4 solution at 37°C at a powder-to-liquid ratio of 2 g/mL, followed by storage in water until 24 hrs after being mixed. Prominent diffraction peaks are labeled: + TTCP, * HA.