Japanese leading local structure study on minerals and melts under shock compression and high-temperature and -pressure

2014 Fiscal Year Final Research Report

• Project/Area Number: 22244068
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: Kumamoto University
• Principal Investigator: YOSHIASA Akira 熊本大学, 自然科学研究科, 教授 (00191536)
• Co-Investigator(Kenkyū-buntansha): MASHIMO Tsutomu 熊本大学, パルスパワー科学研究所, 教授 (90128314) ; OHTAKA Osamu 大阪大学, 理学研究科, 准教授 (40213748) ; OKUDERA Hiroki 金沢大学, 自然科学研究科, 准教授 (50401881) ; NAKUTSUKA Akihiko 山口大学, 理工学研究科, 准教授 (80294651) ; OKUBE Maki 東京工業大学, 応用セラミックス研究所, 助教 (10397060)
• Project Period (FY): 2010-04-01 – 2015-03-31
• Keywords: 局所構造 / 精密構造解析 / 衝撃超高温高圧 / 高圧鉱物 / 高圧融体 / 物性発現機構

Outline of Final Research Achievements

This research is an attempt to read the important record concerning the earth and planet activity that remains in and crystal structures and local structure of elements in solids. The experiments are performed in-situ, by using world’s top level equipment such as the synchrotron facilities. Information on the short to long range order structures is obtained by XAFS and the diffraction methods. Physical property, electronic state and atomic revel structure analyses are put into close contact to investigate details of the melt, glass and crystal materials under extreme conditions. Information on extreme conditions at meteorite impact is frozen in local in impact related glasses. The density of the low-T solid phase is smaller than that of high-T liquid in some P-T region. The existence in such pressure region is general in covalent bond materials. We have clarified the origin on unique valence states and coordination environments in the Earth’s mantle origin minerals.

Free Research Field

結晶学　鉱物学