Table 1:
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% H
3
PO
4
2
50% H
3
PO
4
, 50% H
2
PO
4
-
4.5
100% H
2
PO
4
-
6
90% H
2
PO
4
-
, 10% HPO
4
2-
8
10% H
2
PO
4
-
, 90% HPO
4
2-
9.5
100% HPO
4
2-
12
50% HPO
4
2-
, 50% PO
4
3-
14.5
100% PO
4
3-