A comparison of garnet-ilmenite-perovskite phase equilibria in germanate and silicate systems at high pressures |
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| Institution: | 1. Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan, ROC;2. Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, ROC;3. Advanced Research Center of Green Materials Science & Technology, Taipei, Taiwan, ROC;1. Research Center of Molecular Materials, University of Oulu, P.O. Box 3000, FIN-90014, Finland;2. Institute of Solid State Physics, University of Latvia, 8 Kengaraga, LV-1063 Riga, Latvia;3. Institute of Physics, University of Tartu, Riia 142, Tartu 51014, Estonia;1. College of Mathematics, Physics and information Engineering, Anhui Science and Technology University, Fengyang 233100, China;2. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China |
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| Abstract: | Phase equilibria have been investigated in the system CaGeO3MgGeO2Al2O3 and on germanium analogues of basalt and a pyrolite-related system at pressures between 2 and 11 GPa and at temperatures between 850 and 1200°C. Solid solubility relationships between garnet, ilmenite and perovskite-type phases were determined and compared with those in the corresponding silicate systems. There are some interesting similarities where the germanate equilibria are able to provide insight into the phase chemistry of corresponding silicate systems. However, there are also some significant differences that limit the ability of germanate models to predict the probable behaviour of corresponding silicate systems at higher pressures. |
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