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Table 4.
Reactions for the nucleation of silicate dimers.
| Reactants | Products | ΔE a | ||||||
|---|---|---|---|---|---|---|---|---|
| R1 | MgO | + | MgO | → | MgO2 | + | O | –86.4 |
| R2 | MgO | + | SiO | → | SiO2 | + | Mg | –188.3 |
| R3 | MgO | + | SiO2 | → | SiO3 | + | Mg | –16.3 |
| R4 | MgO2 | + | SiO | → | SiO3 | + | Mg | –98.1 |
| R5 | MgO2 | + | SiO2 | → | MgSiO3 | + | O | –263.4 |
| R6 | MgSiO3 | + | MgO2 | → | Mg2SiO4 | + | O | –269.1 |
| R7 | MgO | + | SiO2 | → | MgSiO | + | O2 | +54.3 |
| R8 | MgO | + | SiO3 | → | MgSiO3 | + | O | –342.3 |
| R9 | Mg2O2 | + | SiO3 | → | Mg2SiO4 | + | O | –355.3 |
| R10 | MgO2 | + | SiO | → | MgSiO2 | + | O | –377.9 |
| R11 | MgSiO2 | + | MgO | → | MgSiO3 | + | Mg | –291.2 |
| R12 | MgSiO2 | + | O2 | → | MgSiO3 | + | O | +41.8 |
| R13 | MgO2 | + | SiO | → | MgSiO | + | O2 | –32.1 |
| R14 | MgSiO | + | O2 | → | MgSiO2 | + | O | –128.5 |
| R15 | MgSiO2 | + | MgO | → | Mg2SiO2 | + | O | +73.5 |
| R16 | MgSiO2 | + | MgO2 | → | Mg2SiO2 | + | O2 | –147.5 |
| R17 | Mg2SiO2 | + | MgO2 | → | Mg2SiO4 | + | Mg | –663.7 |
| R18 | Mg2SiO2 | + | O2 | → | Mg2SiO3 | + | O | –90.5 |
| R19 | MgSiO2 | + | MgO2 | → | Mg2SiO3 | + | O | –237.1 |
| R20 | Mg2SiO3 | + | MgO2 | → | Mg2SiO4 | + | Mg | –323.1 |
| R21 | Mg2SiO3 | + | O2 | → | Mg2SiO4 | + | O | –2.2 |
| R22 | MgSiO3 | + | MgSiO3 | → | Mg2Si2O6 | –770.3 | ||
| R23 | Mg2SiO4 | + | Mg2SiO4 | → | Mg4Si2O8 | –2407.5 | ||
Notes. a Reaction energy in kJ mol−1.
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