Zobrazeno 1 - 10 of 88 pro vyhledávání: '"Osamu Ohtaka"'
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Akademický článek
Crystal structure of SrGeO3 in the high-pressure perovskite-type phase
Autor: Akihiko Nakatsuka, Hiroshi Arima, Osamu Ohtaka, Keiko Fujiwara, Akira Yoshiasa
Publikováno v: Acta Crystallographica Section E: Crystallographic Communications, Vol 71, Iss 5, Pp 502-504 (2015)
Single crystals of the SrGeO3 (strontium germanium trioxide) high-pressure phase have been synthesized successfully at 6 GPa and 1223 K. The compound crystallizes with the ideal cubic perovskite-type structure (space group Pm-3m), which consists of a
Externí odkaz: https://doaj.org/article/c4699082a240478da8a016c704b13ec1
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2
High-temperature diffraction experiments and phase diagram of ZrO2 and ZrSiO4
Autor: Tomotaka Nakatani, Tsubasa Tobase, Shinji Kohara, Ken-ichi Funakoshi, Akira Yoshiasa, Osamu Ohtaka, Hiroshi Arima-Osonoi
Publikováno v: Zeitschrift für Naturforschung B. 76:591-597
High-temperature X-ray diffraction (XRD) experiments up to T = 2710 °C have been performed on ZrSiO4 and ZrO2 powders, using the container-less levitation technique. A two-dimensional imaging plate (IP) detector was used for short-time observation.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::29e0aa61f7bd186e63037d2088a6b1bb
https://doi.org/10.1515/znb-2021-0043
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4
A new high-pressure strontium germanate, SrGe2O5
Autor: Keiko Fujiwara, Akihiko Nakatsuka, Makio Ohkawa, Osamu Ohtaka, Akira Yoshiasa, Kazumasa Sugiyama
Publikováno v: Acta Crystallographica Section C Structural Chemistry. 72:716-719
The Sr–Ge–O system has an earth-scientific importance as a potentially good low-pressure analog of the Ca–Si–O system, one of the major components in the constituent minerals of the Earth's crust and mantle. However, it is one of the germanat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eb4137e94ec670c68b1771ebd5a94bf9
https://doi.org/10.1107/s205322961601353x
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5
A new high-pressure strontium germanate, SrGe
Autor: Akihiko, Nakatsuka, Kazumasa, Sugiyama, Makio, Ohkawa, Osamu, Ohtaka, Keiko, Fujiwara, Akira, Yoshiasa
Publikováno v: Acta crystallographica. Section C, Structural chemistry. 72(Pt 10)
The Sr-Ge-O system has an earth-scientific importance as a potentially good low-pressure analog of the Ca-Si-O system, one of the major components in the constituent minerals of the Earth's crust and mantle. However, it is one of the germanate system
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::5073506d0d519e31842ba4097c47b3a4
https://pubmed.ncbi.nlm.nih.gov/27703116
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7
Foreword
Autor: Osamu OHTAKA
Publikováno v: The Review of High Pressure Science and Technology. 29:73-73
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1d050650c625131e05f7b43d192098e1
https://doi.org/10.4131/jshpreview.29.73
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10
Single-crystal X-ray diffraction study of CaIrO3
Autor: Masahiko Sugahara, Akihiko Nakatsuka, Osamu Ohtaka, Syunsuke Sakai, Takafumi Hashimoto, Akira Yoshiasa, Maki Okube, Akira Yoneda
Publikováno v: American Mineralogist. 93:1148-1152
Single crystals of CaIrO 3 were prepared via flux growth method. Crystal structure parameters, including the anisotropic displacement parameters, are determined based on a single-crystal X-ray diffraction experiment. The unit-cell dimensions are a =
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f4a3236c27e398a6ab5d8d9eafce3f4
https://doi.org/10.2138/am.2008.2701
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