2013 Fiscal Year Final Research Report
Structural Physics of Molecular Crystals Boron Triiodide and Tin Tetraiodide at High Pressure
| Project/Area Number |
23550008
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | Ochanomizu University |
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Principal Investigator |
HAMAYA Nozomu お茶の水女子大学, 大学院人間文化創成科学研究科, 教授 (70156420)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIHISA Hiroshi 独立行政法人産業技術総合研究所, 計測フロンティア研究部門, 主任研究員 (90357913)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 三ヨウ化ホウ素の二量体化 / 四ヨウ化スズの高圧結晶構造 / 四ヨウ化ゲルマニウムの融解曲線 / 高温高圧液体構造 / ラマン散乱実験 / 放射光X線回折実験 / 第一原理計算 |
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| Research Abstract |
To verify universality of various high-pressure phenomena found in molecular crystals is of great importance in developing fundamental and applied material sciences. In this study, we demonstrated experimentally that in boron tiiodide the dimerization of the molecule took place upon the pressure-induced structural change. A crystal structure of a ultra-high pressure phase of tin tetraiodide was successfully estimated from a first-principles calculation based on a density-functional theory. We measured a melting curve of germanium tetraiodide at high pressures and high temperatures. Unique shape of the curve with kink strongly implied the possibility that two distinct structures could be existent in the liquid phase.
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