Table 1.
Phase | Chemical formula | Space group | pKsp at 37 °C | Ca/P molar ratio |
---|---|---|---|---|
MCPM* | Ca(H2PO4)2·H2O | Triclinic Pī | 1.14 | 0.5 |
DCPA* | CaHPO4 | Triclinic Pī | 7.0 | 1 |
β-CPP* | Ca2P2O7 | Tetragonal P41 | 18.5 | 1 |
ACP* | Ca3(PO4)2·nH2O | / | 25 | 1.3–1.5 |
HAP* | Ca10(PO4)6(OH)2 | Pseudo-Hexagonal P63/m | 117.3 | 1.67 |
MCPM = monocalcium phosphate monohydrate; DCPA = dicalcium phosphate anhydrous; CPP = calcium pyrophosphate; ACP = amorphous calcium phosphate (data pertain to the phase obtainable at pH 9 – 11)10; HAP = hydroxyapatite.