Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Yamazaki, D. Articles by Funakoshi, K. Search for Related Content GeoRef GeoRef Citation

Generation of pressures to ~60 GPa in Kawai-type apparatus and stability of MnGeO₃ perovskite at high pressure and high temperature

¹ Institute for Study of the Earth’s Interior, Okayama University, Misasa, Tottori, Japan
² Geodynamics Research Center, Matsuyama, Ehime, Japan
³ Japan Synchrotron Radiation Research Institute, Mikazuki, Hyogo, Japan

Correspondence: ^* E-mail: dy{at}misasa.okayama-u.ac.jp

To obtain higher pressures in a Kawai-type apparatus, we explored and tested high-pressure cell assemblies suitable for experiments using sintered diamond (SD) anvils. As a result, we succeeded in generating pressures exceeding 55 GPa at temperatures of ~1000 °C in a Kawai-type apparatus (SPEED Mk-II) at SPring-8. Using the optimized cell assembly, we examined the stability field of MnGeO₃ perovskite, an analog of MgSiO₃ perovskite, which was recently found to transform to a new high-pressure form under the P-T conditions near the core-mantle boundary. From our in situ X-ray observations, MnGeO₃ perovskite was found to be stable at pressures up to 56–57 GPa at temperatures of 800–1050 °C.

Key Words: Pressure generation • high pressure and temperature • manganese germanate • perovskite