Post-perovskite transitions in CaB4O3 at high pressure

被引:4
作者
Akaogi, M. [1 ]
Shirako, Y. [1 ]
Kojitani, H. [1 ]
Takamori, S. [1 ]
Yamaura, K. [2 ]
Takayama-Muromachi, E. [2 ]
机构
[1] Gakushuin Univ, Dept Chem, Toshima Ku, 1-5-1 Mejiro, Tokyo 1718588, Japan
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan
来源
INTERNATIONAL CONFERENCE ON HIGH PRESSURE SCIENCE AND TECHNOLOGY, JOINT AIRAPT-22 AND HPCJ-50 | 2010年 / 215卷
关键词
PHASE-TRANSITION; CAIRO3; CAPTO3;
D O I
10.1088/1742-6596/215/1/012095
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
High-pressure phase transitions in CaRhO3 were examined using a multianvil apparatus up to 27 GPa and 1930 degrees C. CaRhO3 perovskite transforms to post-perovskite via a monoclinic intermediate phase with increasing pressure. Volume changes for the transitions of perovskite - intermediate phase and of intermediate phase - post-perovskite are -1.1 and -0.7 %, respectively. CaRhO3 post-perovskite is the fourth quenchable post-perovskite oxide found so far. By high-temperature calorimetric experiments, enthalpy of the perovskite - post-perovskite transition in CaRuO3 was measured as 15.2 +/- 3.3 kJ/mol. Combining the datum with those of CaIrO3, it is shown that CaIrO3 perovskite is energetically less stable than CaRuO3 perovskite. This is consistent with the fact that orthorhombic distortion of CaIrO3 perovskite is larger than CaRuO3, as indicated with the tilt-angle of octahedral framework of perovskite structure. The transition pressure from perovskite to post-perovskite in CaBO3 (B = Ru, Rh, Ir) increases almost linearly with decreasing the tilt-angle, suggesting that the perovskite - post-perovskite transition may result from instability of the perovskite structure with pressure.
引用
收藏
页数:4
相关论文
共 13 条
  • [1] Standard Gibbs energy of formation of CaRuO3(s) using solid-state electrochemical cell
    Banerjee, A
    Prasad, R
    Venugopal, V
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2003, 358 (1-2) : 321 - 324
  • [2] High-pressure synthesis, structure, and characterization of a post-perovskite CaPtO3 with CalrO3-type structure
    Inaguma, Yoshiyuki
    Hasumi, Ken-ichiro
    Yoshida, Masashi
    Ohba, Tomonori
    Katsumata, Tetsuhiro
    [J]. INORGANIC CHEMISTRY, 2008, 47 (06) : 1868 - 1870
  • [3] Solid-state cells with buffer electrodes for the measurement of thermodynamic properties of IrO2, CaIrO3, Ca2IrO4, and Ca4IrO6
    Jacob, KT
    Okabe, TH
    Uda, T
    Waseda, Y
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1999, 146 (05) : 1854 - 1861
  • [4] KNACKE O, 1991, THERMOCHEMICAL PROPE, P952
  • [5] Post-perovskite phase transition in CaRuO3
    Kojitani, Hiroshi
    Shirako, Yuichi
    Akaogi, Masaki
    [J]. PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 2007, 165 (3-4) : 127 - 134
  • [6] Thermochemistry and high-pressure equilibria of the post-perovskite phase transition in CaIrO3
    Kojitani, Hiroshi
    Furukawa, Asuka
    Akaogi, Masaki
    [J]. AMERICAN MINERALOGIST, 2007, 92 (01) : 229 - 232
  • [7] Octahedral tilting evolution and phase transition in orthorhombic NaMgF3 perovskite under pressure -: art. no. L04304
    Liu, HZ
    Chen, J
    Hu, J
    Martin, CD
    Weidner, DJ
    Häusermann, D
    Mao, HK
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2005, 32 (04) : 1 - 5
  • [8] Post-perovskite phase transition in MgSiO3
    Murakami, M
    Hirose, K
    Kawamura, K
    Sata, N
    Ohishi, Y
    [J]. SCIENCE, 2004, 304 (5672) : 855 - 858
  • [9] CaPtO3 as a novel post-perovskite oxide
    Ohgushi, Kenya
    Matsushita, Yoshitaka
    Miyajima, Nobuyoshi
    Katsuya, Yoshio
    Tanaka, Masahiko
    Izumi, Fujio
    Gotou, Hirotada
    Ueda, Yutaka
    Yagi, Takehiko
    [J]. PHYSICS AND CHEMISTRY OF MINERALS, 2008, 35 (04) : 189 - 195
  • [10] SHIRAKO Y, 2009, PHYS CHEM M IN PRESS