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Solubility curves of calcium orthophosphoric compounds at 37°C, depending on pH in aqueous solution. HAp: hydroxyapatite (Ca10(PO4)6(OH)2), TCP: calcium phosphate (Ca3(PO4)2), OCP: octacalcium phosphate (Ca8H2(PO4)6 5H2O), DCPA: dicalcium phosphate anhydrous (CaHPO4), DCPD: dicalcium phosphate dihydrate (CaHPO4 2H2O).
