Phase relations in the system MgO-NaCl-H2O: The dehydroxylation of brucite in the presence of NaCl-H2O fluids

American Mineralogist

Volumn 83, Issue 3-4, 1998, Pages 205-212

  Bai, T B ^a   Koster Van Groos, A F ^a  

^a UNIVERSITY OF ILLINOIS AT CHICAGO   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

DIFFERENTIAL THERMAL ANALYSIS; MAGNESIA; OXIDE MINERALS; REACTION INTERMEDIATES;

BRUCITE; DEHYDROXYLATION REACTIONS; DEHYDROXYLATIONS; HIGH PRESSURE; INTERMEDIATE PHASE; PERICLASE; PHASE RELATION;

SODIUM CHLORIDE;

BRUCITE; DEHYDROXYLATION; PHASE RELATIONS;

EID: 0031816423     PISSN: 0003004X     EISSN: None     Source Type: Journal    
DOI: 10.2138/am-1998-3-402     Document Type: Article

References (33)

1. 2O above 573 K. Geochimica et Cosmochimica Acta, 57, 1657-1680.
2. 2O activity in concentrated NaCl solutions at high pressures and temperatures measured by the brucite-periclase equilibrium. Contributions to Mineralogy and Petrology, 125, 200-212.
3. Ball, M.C. and Taylor, H.F.W. (1961) The dehydration of brucite. Mineralogical Magazine, 32, 754-766.
4. 2O-NaOH. American Journal of Science, 261, 120-150.
5. 2O-NaCl to 1000 °C and 1500 bars. Geochimica et Cosmochimica Acta, 49, 1861-1873.
6. 2-NaCl fluids a high pressures and temperatures. Geochimica et Cosmochimica Acta, 47, 1247-1275.
7. Burnham, C.W., Holloway, J.R., and Davis, N.F. (1969) Thermodynamic properties of water to 1000 °C and 10,000 bars. The Geological Society of America Special Paper No. 132.
8. 2. American Mineralogist, 80, 222-230.
9. 2O-NaCl. American Journal of Science, 282, 1325-1339.
10. Fyfe, W.S. (1958) A further attempt to determine the vapor pressure of brucite. American Journal of Science, 256, 729-732.
11. 2O. American Journal of Science, 260, 289-293.
12. 2-NaCl-HCL fluids in the range 500-700 °C, 2 kb. Geochimica et Cosmochimica Acta, 55, 2819-2829.
13. Helgeson, H.C. (1969) Thermodynamics of hydrothermal systems at elevated temperatures and pressures. American Journal of Science, 267, 729-804.
14. Helgeson, H.C., Kirkham, D.H., and Flowers, G.C. (1981) Theoretical prediction of the thermodynamic properties of aqueous electrolytes at high pressure and temperature: IV. Calculation of activity coefficients, osmotic coefficients and apparent molal and standard and relative partial molal properties to 600 °C and 5 kb. American Journal of Science, 281, 1249-1516.
15. Holloway, J.R. (1971) Internally heated pressure vessels. In G.C. Ulmer, Ed., Research for High Pressure and Temperature, p. 217-258. Springer-Verlag, New York.
16. 2O to 15 GPa. American Mineralogist, 78, 271-284.
17. 2-NaCl fluids at high pressures and temperatures. Geochimica et Cosmochimica Acta, 57, 733-746.
18. Kanzaki, M. (1991) Dehydration of brucite at high pressures detected by differential thermal analysis. Geophysical Research Letters, 18, 2189-2192.
19. Kennedy, G.C. (1956) The brucite-periclase equilibrium. American Journal of Science, 254, 567-573.
20. 3 to 10 kbar. Journal of Physical Chemistry, 83, 2976-2978.
21. 2O to 6 kbar. Geochimica et Cosmochimica Acta, 55, 2811-2817.
22. Koster van Groos, A.F. and Guggenheim, S. (1987) Dehydration of a Ca-and a Mg-exchanged montmorillonite (SWy-1) at elevated pressures. American Mineralogist, 72, 292-298.
23. Koster van Groos, A.F. and ter Heege, J. (1973) The high-low quartz transition up to 10 kbar pressure. Journal of Geology, 81, 717-724.
24. Martens, R., Gentsch, H. and Freund, F. (1976) Hydrogen release during the thermal decomposition of magnesium hydroxide to magnesium oxide. Journal of Catalysis, 44, 366-372.
25. 2O. American Journal of Science, 260, 707-717.
26. Oelkers, E.H. and Helgeson, H.C. (1988) Calculation of thermodynamic and transport properties of aqueous species at high pressures and temperatures: Dissociation constants for supercritical alkali metal halides at temperatures from 400 to 800 °C and pressures from 500 to 4000 bars. Journal of Physical Chemistry, 92, 1631-1639.
27. Oelkers, E.H. and Helgeson, H. C. (1991) Calculation of activity coefficient and degree of formation of neutral ion pairs in supercritical electrolyte solutions. Geochimica et Cosmochimica Acta, 55, 1235-1251.
28. 2O and comments on earlier work. American Journal of Science, 255, 573-582.
29. Schramke, J.A., Kerrick, D.M., and Blencoe, J.G. (1982) Experimental determination of the brucite = periclase + water equilibrium with a new volumetric technique. American Mineralogist, 67, 269-276.
30. 2O at elevated temperatures and pressures. American Journal of Science, 260, 115-141.
31. 2O. Geochimica et Cosmochimica Acta, 50, 733-739.
32. 2O fluids on the dehydration of Ca-exchanged montmorillonite (SWy-1) at elevated temperatures and pressures. Geochimica et Cosmochimica Acta, 60, 1267-2172.
33. 2 = MgO reaction. American Journal of Science, 263, 668-677.