American Mineralogist 106(7) 1105-1112 2021年7月 [査読有り]
Abstract
Three single crystals of CaTi2O4 (CT)-type, CaFe2O4 (CF)-type, and new low-density CaFe2O4 (LD-CF) related MgAl2O4 were synthesized at 27 GPa and 2500 °C and also CT-type MgAl2O4 at 45 GPa and 1727 °C using conventional and advanced mul...
EARTH AND PLANETARY SCIENCE LETTERS 309(3-4) 185-197 2011年9月
We precisely compared phase boundaries of post-spinet transition in pyrolite and Mg2SiO4 and of akimotoite-perovskite transition in MgSiO3 at 21-28 GPa and 1400-1800 degrees C by detailed phase relation experiments using a multi-anvil apparatus. W...
M. Akaogi   M. Oohata   H. Kojitani   H. Kawaji   
AMERICAN MINERALOGIST 96(8-9) 1325-1330 2011年8月
The low-temperature isobaric heat capacity (C-p) of synthetic stishovite was measured between 2 and 311 K by the thermal relaxation method. The measured C-p is considerably smaller than that of Holm et al. (1967) over the whole temperature range s...
Two hexagonal aluminous phases, which could serve as potential Na- and K-host minerals in the lower mantle, with compositions K1.00Mg2.00Al4.80Si1.15O12 and Na1.04Mg1.85Al4.64Si1.32O12 were synthesized at 22-25 GPa and 1500 degrees C. The K-rich h...
M. Akaogi   M. Oohata   H. Kojitani   H. Kawaji   
AMERICAN MINERALOGIST 96(8-9) 1325-1330 2011年8月
The low-temperature isobaric heat capacity (C-p) of synthetic stishovite was measured between 2 and 311 K by the thermal relaxation method. The measured C-p is considerably smaller than that of Holm et al. (1967) over the whole temperature range s...
Two hexagonal aluminous phases, which could serve as potential Na- and K-host minerals in the lower mantle, with compositions K1.00Mg2.00Al4.80Si1.15O12 and Na1.04Mg1.85Al4.64Si1.32O12 were synthesized at 22-25 GPa and 1500 degrees C. The K-rich h...