Peer-reviewed

1. T. Meier, F. Trybel, S. Khandarkhaeva, D. Laniel, T. Ishii, A. Aslandukova, N. Dubrovinskaia, L. Dubrovinsky. Structural independence of hydrogen-bond symmetrisation dynamics at extreme pressure conditions. Nature Communications, 13, 1-8, 2022. DOI: https://doi.org/10.1038/s41467-022-30662-4

2. T. Ishii, C. McCammon, T. Katsura. Iron and aluminum substitution mechanism in perovskite phase in the system MgSiO3-FeAlO3-MgO. American Mineralogist, in press. DOI: https://doi.org/10.2138/am-2022-8457

3. A. B. Woodland, L. Uenver-Thiele, T. Boffa Ballaran, N. Miyajima, K. Rosbach, T. Ishii. Stability of Fe5O6 and its relation to other Fe-Mg-oxides at high pressures and temperatures. American Mineralogist, in press. DOI: https://doi.org/10.2138/am-2022-8370

4. I. Koemets, T. Ishii, L. Dubrovinsky, M. Hanfland. Equations of state of α-SiC (6H) and β’-Mg2Si1.1 from single-crystal X-ray diffraction data and novel high-pressure magnesium silicide Mg2Si7. Physics and Chemistry of Minerals, 49, 2022. DOI: https://doi.org/10.1007/s00269-022-01189-3

5. R. Farla, S. Bhat, S. Sonntag, A. Chanyshev, S. Ma, T. Ishii, Liu, Z., A. Nèri, N. Nishiyama, G.A. Faria, T. Wroblewski, H. Schulte-Schrepping, W. Drube, O. Seeck, T. Katsura. Extreme conditions research using the large-volume press at the P61B endstation, PETRA III. Journal of Synchrotron Radiation, 29, 409-423, 2022. DOI: https://doi.org/10.1107/S1600577522001047.

6. T. Ishii, N. Miyajima, G. Criniti, Q. Hu, K. Glazyrin, T. Katsura. High pressure-temperature phase relations of basaltic crust up to mid-mantle conditions. Earth and Planetary Science Letters, 584, 117472, 2022. https://doi.org/10.1016/j.epsl.2022.117472

7. T. Ishii, E. Ohtani, A. Shatskiy. Aluminum and hydrogen partitioning between bridgmanite and high-pressure hydrous phases: Implications for water storage in the lower mantle. Earth and Planetary Science Letters, 583, 117441, 2022. DOI: https://doi.org/10.1016/j.epsl.2022.117441

8. S. Maitani, R. Sinmyo, T. Ishii, S. I. Kawaguchi, N. Hirao. The electrical conductivity of Fe4O5, Fe5O6, and Fe7O9 up to 60 GPa. Physic and Chemistry of Minerals, 49, 2022. DOI: https://doi.org/10.1007/s00269-022-01188-4

9. N. C. Siersch, G. Criniti, A. Kurnosov, T. B. Ballaran, Z. Liu, T. Ishii, D. J. Frost, T. Yu, Y. Wang. The influence of Al2O3 on the structural properties of MgSiO3 akimotoite. American Mineralogist, in press. DOI: https://doi.org/10.2138/am-2022-8257

10. A. Chanyshev, T. Ishii* (co-corresponding author), D. Bondar, S. Bhat, E. J. Kim, R. Farla, K. Nishida, Z. Liu, L. Wang, A. Nakajima, B. Yan, H. Tang, Z. Chen, Y. Higo, Y. Tange, T. Katsura. Depressed 660-km discontinuity caused by akimotoite-bridgmanite transition. Nature, 601, 69-73, 2022. DOI: 10.1038/s41586-021-04157-z

11. H. Tang, X. Yuan, Y. Cheng, H. Fei, F. Liu, T. Liang, Z. Zeng, T. Ishii, M.-S. Wang, T. Katsura, H. Sheng, H. Gou. Synthesis of Paracrystalline Diamond. Nature, 599, 605-610, 2021. DOI: https://doi.org/10.1038/s41586-021-04122-w

12. N. Satta, G. Criniti, A. Kurnosov, T. B. Ballaran, T. Ishii, H. Marquardt. High‐pressure elasticity of δ‐(Al, Fe) OOH single crystals and seismic detectability of hydrous MORB in the shallow lower mantle. Geophysical Research Letters, e2021GL094185, 2021. https://doi.org/10.1029/2021GL094185

13. T. Meier, A. Aslandukova, F. Trybel, D. Laniel, T. Ishii, S. Khandarkhaeva, N. Dubrovinskaia, L. Dubrovinsky. In situ high-pressure nuclear magnetic resonance crystallography in one and two dimensions. Matter and Radiation at Extremes, 6(6), 068402, 2021. DOI: https://doi.org/10.1063/5.0065879

14. D. Bondar, H. Fei, A. C. Withers, T. Ishii, A. Chanyshev, & T. Katsura. A simplified rapid-quench multi-anvil technique. Review of Scientific Instruments, 92(11), 113902, 2021. DOI: https://doi.org/10.1063/5.0062525

15. N. C. Siersch, A. Kurnosov, G. Criniti, T. Ishii, T. B. Ballaran, D. J. Frost. The elastic properties and anisotropic behavior of MgSiO3 akimotoite at transition zone pressures. Physics of the Earth and Planetary Interiors, 320, 106786, 2021. DOI: https://doi.org/10.1016/j.pepi.2021.106786

16. L. Xie, A. Chanyshev, T. Ishii, D. Bondar, K. Nishida, Z. Chen, S. Bhat, R. Farla, Y. Higo, Y. Tange, X. Su, B. Yan, S. Ma, T. Katsura. Simultaneous generation of ultrahigh pressure and temperature to 50 GPa and 3300 K in multi-anvil apparatus. Review of Scientific Instruments, 92(10), 103902, 2021. DOI: https://doi.org/10.1063/5.0059279

17. A. Chanyshev, D. Bondar, H. Fei, N. Purevjav, T. Ishii, K. Nishida, S. Bhat, R. Farla, T. Katsura. Determination of phase relations of the olivine–ahrensite transition in the Mg2SiO4–Fe2SiO4 system at 1740 K using modern multi-anvil techniques. Contributions to Mineralogy and Petrology, 176(10), 1-10, 2021. https://doi.org/10.1007/s00410-021-01829-x

18. J. Buchen, W. Sturhahn, T. Ishii, J, Jackson. Vibrational anisotropy of δ-(Al,Fe)OOH single crystals as probed by nuclear resonant inelastic X-ray scattering. European Journal of Mineralogy, 33(4), 485-502, 2021. https://doi.org/10.5194/ejm-33-485-2021

19. T. Ishii, E. Ohtani. Dry metastable olivine and slab deformation in a wet subducting slab. Nature Geoscience, 14, 526-530, 2021. DOI: 10.1038/s41561-021-00756-7

20. T. Ishii, G. Criniti, E. Bykova, L. Dubrovinsky, T. Katsura, H. Arii, H. Kojitani, M. Akaogi. High-pressure syntheses and crystal structure analyses of a new low-density CaFe2O4-related and CaTi2O4-type MgAl2O4 phases. American Mineralogist, 106(7), 1105-1112, 2021. DOI: 10.2138/am-2021-7619

21. X. Su, C. Zhao, L. Xu, C. Lv, X. Song, T. Ishii, Y. Xiao, P. Cho, Q. Sun, J. Liu. Spectroscopic evidence for the Fe3+ spin transition in iron bearing δ-AlOOH at high pressure. American Mineralogist, 106(11), 1709-1716, 2021. DOI: 10.2138/am-2021-7541

22. C. McGuire, T. Komabayashi, S. Thompson, G. Bromiley, T. Ishii, E. Greenberg, V. B. Prakapen. P-V-T measurements of Fe3C to 117 GPa and 2100 K: implications for stability of Fe3C phase at core conditions. American Mineralogist: Journal of Earth and Planetary Materials, 106(8), 1349-1359, 2021. DOI: 10.2138/am-2021-7581

23. T. Ishii. Development of high-pressure technology with Kawai-type multi-anvil presses and its application to geoscience (マルチアンビル高圧発生装置の技術開発とその地球科学的応用). The Review of High Pressure Science and Technology (高圧力の科学と技術), 30(2), 2020. DOI: https://doi.org/10.4131/jshpreview.30.156

24. E. Marzotto, W.P. Hsieh, T. Ishii, K.H. Chao, G.J Golabek, M. Thielmann, E. Ohtani. Effect of water on lattice thermal conductivity of ringwoodite and its implications for the thermal evolution of descending slabs. Geophysical Research Letters, 47(13), e2020GL087607, 2020. DOI: 10.1029/2020GL087607

25. T. Ishii, N. Miyajima, R. Sinmyo, H. Kojitani, D. Mori, Y. Inaguma, M. Akaogi. Discovery of New‐Structured Post‐Spinel MgFe2O4: Crystal Structure and High‐Pressure Phase Relations. Geophysical Research Letters, 47(6), e2020GL087490, 2020.  DOI: 10.1029/2020GL087490

26. W. P. Hsieh, T. Ishii, K. H. Chao, J. Tsuchiya, F. Deschamps, E. Ohtani. Spin transition of iron in δ‐(Al, Fe) OOH induces thermal anomalies in Earth's lower mantle. Geophysical Research Letters, 47(4), e2020GL087036, 2020. DOI: 10.1029/2020GL087036

27. Z. Liu, C. McCammon, B. Wang, L. Dubrovinsky, T. Ishii, D. Bondar, A. Nakajima, Y. Tange, Y. Higo, T. Cui, B. Liu, T. Katsura. Stability and solubility of the FeAlO3 component in bridgmanite at uppermost lower mantle conditions. Journal of Geophysical Research: Solid Earth, 125(2), e2019JB018447, 2020. DOI: 10.1029/2019JB018447

28. T. Ishii. Crystal Structure of a Novel Fe-Mg Oxide and Deep Earth Science. Nihon Kessho Gakkaishi, 61(4), 205-206, 2019. DOI: 10.5940/jcrsj.61.205

29. T. Ishii, R. Huang, R. Myhill, H. Fei, I. Koemets, Z. Liu, R. Myhill, F. Maeda, L. Yuan, L. Wang, D. Druzhbin, T. Yamamoto, S. Bhat, R. Farla, T. Kawazoe, T. Noriyoshi, E. Kulik, Y. Higo, Y. Tange, T. Katsura. Sharp 660-km discontinuity controlled by extremely narrow binary post-spinel transition. Nature Geoscience, 12, 869-872, 2019. DOI: 10.1038/s41561-019-0452-1

30. K. Hikosaka, R. Sinmyo, K. Hirose, T. Ishii, Y. Ohishi, The stability of Fe5O6 and Fe4O5 at high pressure and temperature. American Mineralogist, 104(9), 1356-1359, 2019. DOI: 10.2138/am-2019-7097

31. T. Ishii, Z. Liu, T. Katsura. A breakthrough in pressure generation by Kawai-type multi-anvil apparatus with tungsten carbide anvils. Engineering, 5, 434-440, 2019. DOI: 10.1016/j.eng.2019.01.013

32. T. Ishii, H. Kojitani, M. Akaogi. Phase relations of harzburgite and MORB up to the uppermost lower mantle conditions: Precise comparison with pyrolite by multi-sample cell technique with implication to dynamics of subducted slabs. Journal of Geophysical Research: Solid Earth, 124, 3491-3507, 2019, DOI: 10.1029/2018JB016749

33. T. Ishii, L. Uenver-Thiele, A. B. Woodland, E. Alig, T. B. Ballaran. Synthesis and crystal structure of Mg-bearing Fe9O11: New insight in the complexity of Fe-Mg oxides at conditions of the deep upper mantle. American Mineralogist, 103, 1873-1876, 2018. DOI: 10.2138/am-2018-6646

34. T. Ishii, T. Sakai, H. Kojitani, D. Mori, Y. Inaguma, Y. Matsushita, K. Yamaura, M. Akaogi. High-Pressure Phase Relations and Crystal Structures of Postspinel Phases in MgV2O4, FeV2O4, and MnCr2O4: Crystal Chemistry of AB2O4 Postspinel Compounds. Inorganic Chemistry, 57, 6648-6657, 2018. DOI: 10.1021/acs.inorgchem.8b00810.

35. T. Ishii, R. Huang, H. Fei1, I. Koemets, Z. Liu, F. Maeda, L. Yuan, L. Wang, D. Druzhbin, T. Yamamoto, S. Bhat, R. Farla, T. Kawazoe, N. Tsujino, E. Kulik, Y. Higo, Y. Tange, T. Katsura. Complete agreement of the post-spinel transition with the 660-km discontinuity. Scientific Reports, 8, 2018. DOI: 10.1038/s41598-018-24832-y

36. T. Ishii, H. Kojitani, M. Akaogi. Phase relations and mineral chemistry in pyrolitic mantle at 1600-2200°C under pressures up to the uppermost lower mantle: Phase transitions around the 660-km discontinuity and dynamics of upwelling hot plumes. Physics of the Earth and Planetary Interiors, 274, 127-137, 2018. DOI: 10.1016/j.pepi.2017.10.005

37. M. Akaogi, A. Kawahara, H. Kojitani, K. Yoshida, Y. Anegawa, T. Ishii. High-pressure phase transitions in MgCr2O4×Mg2SiO4 composition: Reactions between olivine and chromite with implications for ultrahigh-pressure chromitites. American Mineralogist, 103, 161-170, 2018. DOI: 10.2138/am-2018-6135

38. Z. Liu, M. Nishi, T. Ishii, H. Fei, N. Miyajima, T. Boffa Ballaran, H. Ohfuji, T. Sakai, L. Wang, S. Shcheka, T. Arimoto, Y. Tange, Y. Higo, T. Irifune, T. Katsura. Phase relations in the system MgSiO3-Al2O3 up to 2300 K at lower-mantle pressures. Journal of Geophysical Research: Solid Earth, 112, 7775-7788, 2017. DOI: 10.1002/2017jb014579

39. Z. Liu, T. Ishii, T. Katsura. Rapid decrease of MgAlO2.5 in bridgmanite with pressure. Geochemical Perspectives Letters, 5, 12-18, 2017. DOI: 10.7185/geochemlet.1739

40. T. Ishii, D. Yamazaki, N. Tsujino, F. Xu, Z. Liu, T. Kawazoe, T. Yamamoto, D. Druzhbin, L. Wang, Y. Higo, Y. Tange, T. Yoshino, T. Katsura. Pressure generation to 65 GPa in Kawai-type multi-anvil apparatus with tungsten carbide anvils. High Pressure Research, 37, 507-515, 2017. DOI: 10.1080/08957959.2017.1375491

41. T. Ishii, K. Fujino, H. Kojitani, H. Arii, N. Tsujino, N. Miyajima, T. Kunimoto, M. Akaogi. A shallow origin of so-called ultrahigh-pressure chromitites, based on single-crystal X-ray structure analysis of the high-pressure Mg2Cr2O5 phase, with modified ludwigite-type structure. American Mineralogist, 102, 2113-2118, 2017. DOI: 10.2138/am-2017-6050

42. T. Ishii, R. Sinmyo, T. Komabayashi, T. Boffa Ballaran, T. Kawazoe, N. Miyajima, K. Hirose, T. Katsura. Synthesis and crystal structure of LiNbO3-type Mg3Al2Si3O12: A possible indicator of shock conditions of meteorites. American Mineralogist, 102, 1947-1952, 2017. DOI: 10.2138/am-2017-6027

43. S. Rout, P.R. Heck, N. Zaluzec, T. Ishii, J. Wen, D. Miller, B. Schmitz. Shocked chromites in fossil L chondrites: A Raman spectroscopy and transmission electron microscopy study. Meteoritics and Planetary Science, 52, 1776-1796, 2017. DOI: 10.1111/maps.12887

44. T. Kawazoe, I. Ohira, T. Ishii, T. Boffa Ballaran, C. McCammon, A. Suzuki, E. Ohtani. Single crystal synthesis of δ-(Al,Fe)OOH. American Mineralogist, 102, 1953-1956, 2017. DOI: 10.2138/am-2017-6153

45. M. Akaogi, K. Abe, H. Yusa, T. Ishii, T. Tajima, H. Kojitani, D. Mori, Y. Inaguma. High-pressure high-temperature phase relations in FeTiO3 up to 35 GPa and 1600°C. Physics and Chemistry of Minerals, 44, 63-73, 2017. DOI: 10.1007/s00269-016-0836-3

46. T. Ishii, L. Shi, R. Huang, N. Tsujino, D. Druzhbin, R. Myhill, Y. Li, L. Wang, T. Yamamoto, N. Miyajima, T. Kawazoe, N. Nishiyama, Y. Higo, Y. Tange, T. Katsura. Generation of pressures over 40 GPa using Kawai-type multi-anvil press with tungsten carbide anvils. Review of Scientific Instruments, 87, 024501-1-6, 2016. DOI: 10.1063/1.4941716

47. T. Ishii, K. Fujino, H. Kojitani, H. Yusa, D. Mori, Y. Inaguma, Y. Matsushita, K. Yamaura, M. Akaogi. High-pressure high-temperature transitions in MgCr2O4 and crystal structures of new post-spinel MgCr2O4 and Mg2Cr2O5 phases. American Mineralogist, 100, 59-65, 2015. DOI: 10.2138/am-2015-4818

48. T. Ishii, H. Kojitani, S. Tsukamoto, K. Fujino, D. Mori, Y. Inaguma, N. Tsujino, T. Yoshino, D. Yamazaki, Y. Higo, K. Funakoshi, M. Akaogi. High-pressure phase transitions in FeCr2O4 and structure analysis of new post-spinel FeCr2O4 and Fe2Cr2O5 phases with meteoritical and petrological implications. American Mineralogist, 99, 1788-1797, 2014. DOI: 10.2138/am.2014.4736

49. J.-G. Cheng, T. Ishii, H. Kojitani, K. Matsubayshi, A. Mastuo, X. Li, Y. Shirako, J.-S. Zhou, J. B. Goodenough, C. Q. Jin, M. Akaogi, Y. Uwatoko. High-pressure synthesis of the BaIrO3 perovskite: A Pauli paramagnetic metal with a Fermi liquid ground state. Physical Review B, 88, 205114, 2013. DOI: 10.1103/physrevb.88.205114

50. H. Kojitani, T. Ishii, Masaki Akaogi. Thermodynamic investigation on phase equilibrium boundary between calcium ferrite-type MgAl2O4 and MgO + α-Al2O3. Physics of the Earth and Planetary Interiors, 212, 100-105, 2012. DOI: 10.1016/j.pepi.2012.10.002

51. T. Ishii, H. Kojitani, M. Akaogi. High-pressure phase transitions and subduction behavior of continental crust a pressure-temperature conditions up to the upper part of the lower mantle. Earth and Planetary Science Letters, 357, 31-41, 2012. DOI: 10.1016/j.epsl.2012.09.019

52. M. Akaogi, N. Horiuchi, T. Ishii, H. Kojitani. High-pressure phase relations in the system TiO2-ZrO2 to 12 GPa: stability of αPbO2-type srilankite solid solutions of (Ti1-x,Zrx)O2 (0≤x≤0.6). Physics and Chemistry of Minerals, 39, 797-802, 2012. DOI: 10.1007/s00269-012-0534-8

53. T. Ishii, H. Kojitani, M. Akaogi. Post-spinel transitions in pyrolite and Mg2SiO4 and akimotoite-perovskite transition in MgSiO3: Precise comparison by high-pressure high-temperature experiments with multi-sample cell technique. Earth and Planetary Science Letters, 309, 185-197, 2011. DOI: 10.1016/j.epsl.2011.06.023