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pH-dependency of phosphoric acids and its salts [55]. All these ions can interact with calcium ions, which lead to a huge variety of calcium phosphate phases.
| pH | Mol-% |
|---|---|
| -0.5 | 100% H3PO4 |
| 2 | 50% H3PO4, 50% H2PO4- |
| 4.5 | 100% H2PO4- |
| 6 | 90% H2PO4-, 10% HPO42- |
| 8 | 10% H2PO4-, 90% HPO42- |
| 9.5 | 100% HPO42- |
| 12 | 50% HPO42-, 50% PO43- |
| 14.5 | 100% PO43- |
