Table 3.
The precipitation of insoluble magnesium carbonates. The activity products (Q) and the solubility products Ksp (at 25 °C) are obtained from the literature.
| Formula | Activity Product (Q) | Solubility Product, Ksp at 25 °C | Ref. | |
|---|---|---|---|---|
| Nesquehonite | MgCO3·3H2O | {Mg2+} {CO32−} | 2.38 × 10−6 | [99] |
| 1.10 × 10−5 | [118] | |||
| 2.57 × 10−6 | [119] | |||
| 5.37 × 10-6 | [120] | |||
| 4.57 × 10−6 *† | [120] | |||
| 5.90 × 10−5 | [121] | |||
| Artinite | Mg2CO3(OH)2·3H2O | {Mg2+}2 {CO32−} {OH−}2 | 6.31 × 10−18 | [119] |
| 7.76 × 10−18 * | [122] | |||
| Hydromagnesite | Mg5(CO3)4(OH)2·4H2O | {Mg2+}5 {CO32−}4 {OH−}2 | 6.31 × 10−31 | [119] |
| 1.25 × 10−32 | [123] | |||
| 3.16 × 10−33 *† | [123] | |||
| 8.32 × 10−38 | [124] | |||
| Dypingite | Mg5(CO3)4(OH)2·nH2O | {Mg2+}5 {CO32−}4 {OH−}2 | 1.12 × 10−35 | [120] |
| (n = 5 or 8) | 9.12 × 10−37 *† | [120] |
* Values used in the calculations presented in this work; † Ksp obtained at 35 °C.