Experimental study and thermodynamic modeling of the MgO-NiO-SiO2 system

Prostakova, Viktoria, Chen, Jiang, Jak, Evgueni and Decterov, Sergei A. (2013) Experimental study and thermodynamic modeling of the MgO-NiO-SiO2 system. Journal of Chemical Thermodynamics, 62 43-55. doi:10.1016/j.jct.2013.02.019

Author Prostakova, Viktoria
Chen, Jiang
Jak, Evgueni
Decterov, Sergei A.
Title Experimental study and thermodynamic modeling of the MgO-NiO-SiO2 system
Journal name Journal of Chemical Thermodynamics   Check publisher's open access policy
ISSN 0021-9614
Publication date 2013-07
Sub-type Article (original research)
DOI 10.1016/j.jct.2013.02.019
Volume 62
Start page 43
End page 55
Total pages 13
Place of publication London, United Kingdom
Publisher Academic Press
Collection year 2014
Language eng
Formatted abstract
The MgO-NiO-SiO2 system has been studied by a combination of thermodynamic modeling and experimental measurements of phase equilibria. A complete literature review, critical evaluation and thermodynamic modeling of phase diagrams and thermodynamic properties of all oxide phases in the MgO-NiO-SiO2 system at 1 atm total pressure are presented. To resolve the contradictions in the literature data, a new experimental investigation has been carried out over the temperature range from (1400 to 1650) °C using an equilibration and quenching technique followed by electron probe X-ray microanalysis (EPMA). Tie-lines between olivine and monoxide, olivine and proto-pyroxene, liquid and olivine and liquid and cristobalite have been measured. The whole set of experimental data, including the new experimental results and previously published data, has been taken into consideration in thermodynamic modeling of oxide phases in the MgO-NiO-SiO2 system. The Modified Quasichemical Model has been used for the liquid phase. A simple random mixing model with a polynomial expansion of the excess Gibbs energy has been used for the monoxide solid solution. The models for olivine and proto-pyroxene were developed within the framework of the Compound Energy Formalism. The optimized model parameters reproduce all available thermodynamic and phase diagram data within experimental error limits.
Keyword Measurements of phase equilibria
Thermodynamic modeling
Nickel extraction
Oxide systems
MgO-NiO-SiO2 system
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2014 Collection
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Citation counts: TR Web of Science Citation Count  Cited 1 times in Thomson Reuters Web of Science Article | Citations
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