Articles | Volume 35, issue 6
https://doi.org/10.5194/ejm-35-1051-2023
https://doi.org/10.5194/ejm-35-1051-2023
Research article
 | 
27 Nov 2023
Research article |  | 27 Nov 2023

The miscibility gap between the rock salt and wurtzite phases in the MgO–ZnO binary system to 3.5 GPa

Nicholas Farmer and Hugh St. C. O'Neill

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Cited articles

Abdeyazdan, H., Shevchenko, M., Hayes, P. C., and Jak, E.: Integrated experimental and thermodynamic modeling investigation of phase equilibria in the PbO–MgO–SiO2 system in air, Metall. Mater. Trans. B, 53, 954–967, https://doi.org/10.1007/s11663-022-02440-6, 2022. 
Abdeyazdan, H., Shevchenko, M., Chen, J., Hayes, P. C., and Jak, E: Phase equilibria in the ZnO-MgO-SiO2 and PbO-ZnO-MgO-SiO2 systems for characterizing MgO-based refractory–slag interactions, J. Eur. Ceram. Soc., 44, 510–531, https://doi.org/10.1016/j.jeurceramsoc.2023.08.036, 2024. 
Alvarado, A., Attapattu, J., Zhang, Y., and Chen, C.: Thermoelectric properties of rocksalt ZnO from first-principles calculations, J. Appl. Phys., 118, 165101, https://doi.org/10.1063/1.4934522, 2015. 
Armstrong, J. T., Donovan, J., and Carpenter, P.: CALCZAF, TRYZAF and CITZAF: The Use of Multi-Correction-Algorithm Programs for Estimating Uncertainties and Improving Quantitative X-ray Analysis of Difficult Specimens, Microsc. Microanal., 19, 812–813, https://doi.org/10.1017/S1431927613006053, 2013. 
Baranov, A. N., Sokolov, P. S., Kurakevych, O. O., Tafeenko, V. A., Trots, D., and Solozhenko, V. L.: Synthesis of rock-salt MeO–ZnO solid solutions (Me = Ni2+, Co2+, Fe2+, Mn2+) at high pressure and high temperature, High Pressure Res., 28, 515–519, https://doi.org/10.1080/08957950802379307, 2008. 
Short summary
The chemical compositions of the synthetic minerals periclase and zincite in the MgO–ZnO binary system change smoothly and systematically with pressure when they exist together in equilibrium. We have studied these changes experimentally over a wide range of conditions and fitted the results to a thermodynamic model. The model may be used to predict the compositions of the coexisting phases accurately at high pressures and temperatures corresponding to the Earth’s crust and uppermost mantle.