A thermodynamic model for subsolidus equilibria in the system CaO-MgO-Al2O3-SiO2

Details A thermodynamic model for subsolidus equilibria in the system CaO-MgO-Al2O3-SiO2 A thermodynamic model for subsolidus equilibria in the system CaO-MgO-Al2O3-SiO2

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48..159w&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 48, Jan. 1984, p. 159-176.

Mathematics

26

Aluminum Oxides, Calcium Oxides, Magnesium Oxides, Minerals, Silicon Oxides, Thermodynamic Properties, Enthalpy, Entropy, Forsterite, Gabbro, Garnets, Mathematical Models, Pyroxenes, Quartz, Spinel

Scientific paper

It is shown that the high temperature enthalpy of solution data for pure phases and solid solutions in the CMAS system are, for 'gabbroic' and 'peridotitic' compositions, consistent with available phase equilibrium data for the MAS, CAS and CMAS systems. A refined set of values of thermodynamic properties for these phases and solid solutions is tabulated. The small differences between the new data set and that of Helgeson et al. (1978) arise from new data on heat capacity and enthalpy being incorporated. The important constraints applied and the major difficulties in fitting which arose are summarized.

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