High-Pressure and High-Temperature Phase Transitions in Fe2TiO4 and Mg2TiO4 with Implications for Titanomagnetite Inclusions in Superdeep Diamonds
Abstract
:1. Introduction
2. Experimental Methods
3. Results
3.1. Phase Transitions in Mg2TiO4
3.2. Phase Transitions in Fe2TiO4
4. Discussion
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Run No. | Pressure (GPa) | Temperature (°C) | (min) | Run Product |
---|---|---|---|---|
O160915 | 21 | 1000 | 120 | Pe, Ln |
O161025 | 23 | 1000 | 90 | Pe, α |
O161017 | 21 | 1300 | 90 | Pe, Ln |
O170116 | 22.5 | 1300 | 50 | Ln, Pe, α |
O161128 | 23.5 | 1300 | 60 | Pe, α, Ln(tr) |
O160909 | 24.5 | 1300 | 60 | Pe, α |
O160924 | 28 | 1300 | 90 | Pe, α |
O161106 | 28 | 1400 | 90 | Pe, α, Ln(tr) |
O170219 | 22 | 1500 | 90 | Ln, Pe, α |
O170202 | 25 | 1500 | 60 | Pe, α |
O170126 | 28 | 1500 | 60 | Pe, α |
O161021 | 21 | 1600 | 90 | Pe, Ln |
O161124 | 22 | 1600 | 60 | Pe, Ln |
O161209 | 23.5 | 1600 | 60 | Ln, Pe, α |
O160903 | 24.5 | 1600 | 60 | Pe, α, Ln(tr) |
Comp. | Structure | V0 (cm3/mol) | Ref. | Comp. | Structure | V0 (cm3/mol) | Ref. |
---|---|---|---|---|---|---|---|
MgO | rock-salt | 11.24 | a | FeO | rock-salt | 12.17 | i |
MgTiO3 | ilmenite | 30.86 | b | FeTiO3 | ilmenite | 31.72 | j |
MgTiO3 | perovskite | 29.31 | c | FeTiO3 | perovskite | 30.34 | k |
MgTiO3 | LiNbO3 | 30.71 | d | FeTiO3 | LiNbO3 | 31.34 | j |
Mg2TiO4 | spinel | 45.25 | e | Fe2TiO4 | spinel | 46.84 | e |
TiO2 | αPbO2 | 18.41 | f | Fe2TiO4 | CaTi2O4 | 42.41 | e |
TiO2 | baddeleyite | 16.90 | g | ||||
TiO2 | OI | 16.83 | h |
Run no. | Pressure (GPa) | Temperature (°C) | Time (min) | Run Product * |
---|---|---|---|---|
M150109 | 12.5 | 1000 | 60 | Ilm, Wu |
M150107 | 12.5 | 1100 | 60 | Ilm, Wu |
M140806 | 13 | 1100 | 60 | Ilm, Ln, Wu |
M150115 | 14 | 1100 | 60 | Ln, Wu |
M141128 | 15.5 | 1100 | 60 | Ln, Wu |
M140707 | 16 | 1100 | 60 | CT |
M150218 | 17 | 1100 | 60 | CT |
M150603 | 20 | 1100 | 60 | CT |
M150226 | 23 | 1100 | 60 | CT |
M150516 | 24 | 1100 | 60 | CT |
M150127 | 12.5 | 1200 | 60 | Ilm, Ln, Wu |
M150416 | 18 | 1200 | 60 | CT |
M150707 | 11 | 1300 | 60 | Ilm, Wu |
M150725 | 12 | 1300 | 60 | Ilm, Wu |
M140728 | 13 | 1300 | 60 | Ln, Wu |
M150625 | 14 | 1300 | 60 | Ln, Wu |
M150202 | 15 | 1300 | 60 | CT |
M140626 | 15 | 1300 | 60 | CT, Ln, Wu |
M140701 | 18 | 1300 | 60 | CT |
M140710 | 18 | 1300 | 60 | CT |
M150227 | 20 | 1300 | 60 | CT |
M150606 | 22 | 1300 | 60 | CT |
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Akaogi, M.; Tajima, T.; Okano, M.; Kojitani, H. High-Pressure and High-Temperature Phase Transitions in Fe2TiO4 and Mg2TiO4 with Implications for Titanomagnetite Inclusions in Superdeep Diamonds. Minerals 2019, 9, 614. https://0-doi-org.brum.beds.ac.uk/10.3390/min9100614
Akaogi M, Tajima T, Okano M, Kojitani H. High-Pressure and High-Temperature Phase Transitions in Fe2TiO4 and Mg2TiO4 with Implications for Titanomagnetite Inclusions in Superdeep Diamonds. Minerals. 2019; 9(10):614. https://0-doi-org.brum.beds.ac.uk/10.3390/min9100614
Chicago/Turabian StyleAkaogi, Masaki, Taisuke Tajima, Masaki Okano, and Hiroshi Kojitani. 2019. "High-Pressure and High-Temperature Phase Transitions in Fe2TiO4 and Mg2TiO4 with Implications for Titanomagnetite Inclusions in Superdeep Diamonds" Minerals 9, no. 10: 614. https://0-doi-org.brum.beds.ac.uk/10.3390/min9100614