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Comparison of the Ca/P molar ratio measured by XRD after sintering of the cylinders (3 h at 1100 °C) and after the initial powder calcination (1 h at 850 °C). Black dashed curve represents the linear correlation between these two parameters (y = 1.0001x; R2 = 0.9784) and orange highlighting stand for the 99% confidence interval (C·I.: 0.9983; 1.0019). Values are represented as mean (n = 3) ± their repeatability (2.77*estimated standard deviation of the Rietveld refinement).
