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Table 2 Solubility data

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

  1. aCalculations using the formalism from Manning (1994)
  2. bSee text for calculations