{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1361413118166399360.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2138/am-2020-7153"}},{"identifier":{"@type":"URI","@value":"https://pubs.geoscienceworld.org/msa/ammin/article-pdf/105/6/917/5050584/am-2020-7153.pdf"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Stability of fcc phase FeH to 137 GPa"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title>\n               <jats:p>We examined the crystal structure of FeHX (X~1) (FeH hereafter) at high pressure and temperature by X-ray diffraction up to 137 GPa. Results show that FeH adopts a face-centered cubic (fcc) structure at pressures of 43 to 137 GPa and temperatures of ~1000 to 2000 K. Our study revises a phase diagram of stoichiometric FeH in which fcc has a wider-than-expected stability field at high pressure and temperature. Based on our findings, the FeH end-member of the Fe-FeH system is expected to be stable in the fcc structure at the P-T conditions of the Earth's core, rather than in the double-hexagonal close packed (dhcp) structure as previously reported. We compared the experimentally determined unit-cell volumes of FeH with those from ab initio calculations. Additionally, we observed a change in compressibility at ~60 GPa, which could be attributed to a magnetic transition—an interpretation supported by our ab initio computations.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381413118166399362","@type":"Researcher","foaf:name":[{"@value":"Chie Kato"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Sciences, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo, 152-8550, Japan"},{"@value":"Earth-Life Science Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo, 152-8550, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1420282801210969344","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"60726991"},{"@type":"NRID","@value":"1000060726991"},{"@type":"NRID","@value":"9000367865909"},{"@type":"NRID","@value":"9000402042433"}],"foaf:name":[{"@value":"Koichiro Umemoto"}],"jpcoar:affiliationName":[{"@value":"Earth-Life Science Institute, Tokyo 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Hirose"}],"jpcoar:affiliationName":[{"@value":"Earth-Life Science Institute, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo, 152-8550, Japan"},{"@value":"Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-0033, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381413118166399364","@type":"Researcher","foaf:name":[{"@value":"Yasuo Ohishi"}],"jpcoar:affiliationName":[{"@value":"Japan Synchrotron Radiation Research Institute, 1-1-1 Koto, Sayo, Hyogo, 679-5198, Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"0003004X"},{"@type":"EISSN","@value":"19453027"}],"prism:publicationName":[{"@value":"American Mineralogist"}],"dc:publisher":[{"@value":"Mineralogical Society of 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