From: Silicate solution, cation properties, and mass transfer by aqueous fluid in the Earth’s interior
SiO2–H2O | ||||
Temp (°C) | Press (MPa) | Density (g/cm3) | fH2O (MPa) | SiO2 solubility, mSiO2 (kg/mol)a |
800 | 728 | 0.794 | 852 | 0.0304 |
775 | 956 | 0.876 | 1440 | 0.0273 |
700 | 696 | 0.831 | 668 | 0.0082 |
625 | 542 | 0.813 | 364 | 0.0022 |
550 | 391 | 0.789 | 178 | 0.0004 |
SiO2–NaOH–H2O | ||||
Temp (°C) | Press (MPa) | Density (g/cm3) | fH2O (MPa) | SiO2 solubility, mSiO2 (kg/mol)b |
800 | 1135 | 0.911 | 1978 | 0.0238 |
775 | 1012 | 0.891 | 1642 | 0.0448 |
700 | 851 | 0.88 | 999 | 0.0288 |
550 | 583 | 0.871 | 328 | 0.0092 |
SiO2–CaO–H2O | ||||
Temp (°C) | Press (MPa) | Density (g/cm3) | fH2O (MPa) | SiO2 solubility, mSiO2 (kg/mol)b |
575 | 396 | 0.775 | 198 | 4.86525E−08 |
625 | 468 | 0.779 | 291 | 1.43231E−07 |
675 | 498 | 0.764 | 362 | 1.38469E−05 |
725 | 709 | 0.824 | 723 | 9.61047E−05 |
775 | 953 | 0.875 | 1430 | 0.000369701 |
825 | 933 | 0.849 | 1444 | 0.000506355 |