Table 1: Chemical composition of some calcium phosphates minerals.

Ca:PMineral nameFormulaChemical use

1.0MonetiteCaHPO4Dicalcium phosphate (DCP)
1.0BrushiteCaHPO4·2H2ODicalcium phosphate dihydrate (DCPD)
1.33Ca8(HPO4)2(PO4)4·5H2OOctacalcium phosphate (OCP)
1.43WhitlockisiteCa10(HPO4)(PO4)6
1.5Ca3(PO4)2Tricalcium phosphate (TCP)
1.67HydroxyapatiteCa10(PO4)6(OH)2
2.0Ca4P2O9Tetracalcium phosphate