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. Author manuscript; available in PMC: 2014 May 1.
Published in final edited form as: J Biomed Mater Res A. 2012 Oct 31;101(5):1427–1436. doi: 10.1002/jbm.a.34437

Table 1.

CAP phases synthesized as a part of this study.

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.