Search for structural phase transitions in the molecular phases of bromine and iodine under high pressure
| Project/Area Number |
21550029
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical chemistry
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
TAKEMURA Kenichi 独立行政法人物質・材料研究機構, 先端材料プロセスユニット, 主席研究員 (20171671)
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| Co-Investigator(Renkei-kenkyūsha) |
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) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2009: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Keywords | 結晶構造 / 分子性結晶 / 構造相転移 / 圧力誘起分子解離 / ダイヤモンドアンビルセル / 高圧X線回折 |
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| Research Abstract |
We have succeeded in taking powder x-ray diffraction patterns of solid bromine under high pressure with a He-pressure medium. The obtained patterns showed no evidence of structural phase transitions around25and65GPa, which have been proposed in previous high-pressure experiments. Our data, however, still contain sizable errors in atomic positional coordinates. This comes from the uncertainty in diffraction intensity scattered by large powder crystallites. Accordingly, we cannot conclude the absence of structural phase transitions in the molecular phase of bromine from the present experimental data.
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Report
(4 results)
Research Products
(2 results)
