- Calcium phosphate monobasic: Ca(H2PO4)2
- Calcium phosphate dibasic: CaHPO4
- Calcium phosphate tribasic or hydroxyapatite: Ca5(PO4)3OH
Physical Properties of Calcium Phosphate:
| Properties | Details |
| Appearance | White(odorless powder) |
| State | Solid |
| Hardness | Varies depending on the specific form |
| Crystal Structure | Various crystal structures, including
· hydroxyapatite · and brushite |
| Solubility | Insoluble in water |
| Particle Size | Typically fine powder |
| Melting Point | Approximately 1,450°C (2,642°F) |
| Density | 2.93 g/cm³ |
Chemical Properties of Calcium Phosphate:
| Properties | Details |
| Chemical Formula | Various forms: · Ca₃(PO₄)₂, · Ca₂HPO₄, · CaHPO₄, · Ca₃(PO₄)₂H₂O, etc. |
| Hygroscopicity | Absorbs moisture from the air |
| Decomposition Point | Decomposes at high temperatures into calcium oxide and phosphorus pentoxide |
| pH | Varies depending on the specific form |
| Solubility | Soluble in acids, such as hydrochloric acid,forming calcium and phosphate ions |
| Reactivity | Reacts with strong acids and bases |
| Stability | Stable under normal conditions |
| Biocompatibility | Widely used in biomedical applications due to its biocompatible nature |
Reaction of calcium phosphate with Alkali Metal
| Alkali Metal | Reaction with Calcium Phosphate |
| Lithium (Li) | 2Li3PO4 + 3 CaCl2 react and convert into Ca3(PO4)2 + 6LiCl |
| Sodium (Na) | 6Na3PO4 + 2 CaCl2 react and convert into Ca3(PO4)2 + 6NaCl |
| Potassium (K) | 6K3PO4 + 2 CaCl2 react and convert into Ca3(PO4)2 + 6KCl |
| Rubidium (Rb) | 6Rb3PO4 + 2 CaCl2 react and convert into Ca3(PO4)2 + 6RbCl |
| Cesium (Cs) | 6Cs3PO4 + 2CaCl2 react and convert into Ca3(PO4)2 + 6CsCl |
Reaction of calcium phosphate with Transition Metal
| Transition Metal | Reaction with Calcium Phosphate |
| Iron (Fe) | 5 Ca3(PO4)2 + 10FeCl2 react and convert into 10CaCl2 + 6Fe3(PO4)2 |
| Copper (Cu) | no product formed |
| Zinc (Zn) | 3 Ca3(PO4)2 2 + 10ZnSO4 react and convert into 10CaSO4 + 6Zn3(PO4)2 |
| Nickel (Ni) | no product formed |
| Cobalt (Co) | no product formed |
| Manganese (Mn) | 3 Ca3(PO4)2 + 10MnO2 react and convert into 6Mn3(PO4)2 + 9CaO + 2Mn2O3 |
| Chromium (Cr) | no product formed |
| Titanium (Ti) | no product formed |
Reaction of calcium phosphate with Non-Transition Metal
| Non-Transition Metal | Reaction with Calcium Phosphate |
| Aluminum (Al) | 2AlPO4 + 3Ca(OH)2 react and convert into Al2(OH)3 + 3 Ca3(PO4)2 |
| Gallium (Ga) | no product formed |
| Silicon (Si) | no product formed |
| Germanium (Ge) | no product formed |
| Tin (Sn) | no product formed |
| Lead (Pb) | 3Pb3(PO4)2 + 10PbO react and convert into 6Pb4P2O7 + 9CaO |
| Antimony (Sb) | no product formed |
| Bismuth (Bi) | no product formed |
| Arsenic (As) | no product formed |
Reaction of calcium phosphate with Non-Metal
| Non-Metal | Reaction with Calcium Phosphate |
| Hydrogen (H) | no product formed |
| Carbon (C) | no product formed |
| Nitrogen (N) | no product formed |
| Oxygen (O) | no product formed |
| Fluorine (F) | no product formed |
| Phosphorus (P) | 3 Ca3(PO4)2 + 10P4 + 30O2 react and convert into 18CaO + 20P2O5 + 36CO2 |
| Sulfur (S) | no product formed |
| Chlorine (Cl) | 3 Ca3(PO4)2 + 10CaCl2 + 20Cl2 react and convert into 30CaCl2 + 6Ca(PO4)2 + 40Cl2 |