{"@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/1360005518172987648.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2019gl083472"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/pdf/10.1029/2019GL083472"}},{"identifier":{"@type":"URI","@value":"https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2019GL083472"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2019GL083472"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"First‐Principles Determination of the Dissociation Phase Boundary of Phase H MgSiO<sub>4</sub>H<sub>2</sub>"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>Phase H (MgSiO<jats:sub>4</jats:sub>H<jats:sub>2</jats:sub>) is considered an important carrier of water into the lower mantle by the subduction of slabs. This phase has been reported to decompose into H<jats:sub>2</jats:sub>O ice VII and MgSiO<jats:sub>3</jats:sub> bridgmanite under pressure. However, the dissociation phase boundary under the mantle pressure and temperature conditions has not been determined thus far. In this work, the dissociation phase boundary of phase H is determined by the calculation of Gibbs free energy of H<jats:sub>2</jats:sub>O ice VII. The stability field of phase H is found to be significantly extended from 52 to 62 GPa by the inclusion of zero‐point vibrational energy. Phase H decomposes into MgSiO<jats:sub>3</jats:sub> bridgmanite and H<jats:sub>2</jats:sub>O ice VII at approximately 60 GPa (at ∼1000 K). This result indicates that the transportation of water by dense hydrous magnesium silicates may be terminated at a depth of approximately 1,500 km in the middle of the lower mantle in a pure Mg‐endmember composition.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380005518172987648","@type":"Researcher","foaf:name":[{"@value":"Jun Tsuchiya"}],"jpcoar:affiliationName":[{"@value":"Geodynamics Research Center Ehime University  Matsuyama Ehime Japan"},{"@value":"Earth‐Life Science Institute Tokyo Institute of Technology  Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1030007827730869762","@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 Institute of Technology  Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00948276"},{"@type":"EISSN","@value":"19448007"}],"prism:publicationName":[{"@value":"Geophysical Research Letters"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2019-07-08","prism:volume":"46","prism:number":"13","prism:startingPage":"7333","prism:endingPage":"7336"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://onlinelibrary.wiley.com/doi/pdf/10.1029/2019GL083472"},{"@id":"https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2019GL083472"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2019GL083472"}],"createdAt":"2019-06-11","modifiedAt":"2023-08-28","project":[{"@id":"https://cir.nii.ac.jp/crid/1040000781833944832","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"15H05834"},{"@type":"JGN","@value":"JP15H05834"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PLANNED-15H05834/"}],"notation":[{"@language":"ja","@value":"核－マントル物質とダイナミクスの理論モデリング"},{"@language":"en","@value":"Theoretical Modeling of Core-Mantle Materials and Dynamics"}]},{"@id":"https://cir.nii.ac.jp/crid/1040000781965766912","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"17K05627"},{"@type":"JGN","@value":"JP17K05627"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K05627/"}],"notation":[{"@language":"ja","@value":"地球内核・系外惑星深部圧力下における地球惑星構成物質の理論研究"},{"@language":"en","@value":"Theoretical study of Earth/planet-forming materials in Earth's inner core and deep inside of exoplanets"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002215916266624","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Stability of a hydrous δ-phase, AlOOH–MgSiO2(OH)2, and a mechanism for water transport into the base of lower mantle"}]},{"@id":"https://cir.nii.ac.jp/crid/1360002216799523968","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"The pyrite-type 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