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Figure 5.
The FTIR spectra of calcium phosphate precipitates obtained at drifting (A) or constant (B) initial pH values (6.70, 7.50, 8.50 and 9.50) from solutions at 20.00 mmol·L−1 initial phosphate concentration and 1.50 Ca/P molar ratio. They are compared to standard spectra of brushite, CDA and OCP.