{"@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/1362825895478941056.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.2138/am-1999-7-816"}}],"dc:title":[{"@value":"Symmetry change of majorite solid solution in the system Mg<sub>3</sub>Al<sub>2</sub>Si<sub>3</sub>O<sub>12</sub>-MgSiO<sub>3</sub>"}],"description":[{"notation":[{"@value":"Six single crystals of Mg 3 (Mg x Si x Al (sub 2-2x) )Si 3 O 12 with x = 0.05, 0.13, 0.24, 0.38, 0.52, and 0.64 (the majorite solid-solution) were synthesized at 20 GPa and 2000 degrees C with a \"6-8\" type uniaxial split-sphere apparatus. Single-crystal X-ray diffraction studies revealed discontinuities in compositional dependence of the molar volume, equivalent isotropic temperature factors (Be q ), and mean bond lengths between x = 0.24 and 0.38. Single crystals in the compositional range 0  I4 1 /acd --> I4 1 /a, with increasing MgSiO 3 component. The symmetry changes from Ia3d to I4 1 /acd cannot be explained by the cation ordering on the octahedral site. Strong electrostatic interaction between the dodecahedral (Mg (super 2+) ) and tetrahedral (Si (super 4+) ) cations was observed from atomic thermal motion and electron density distribution. Because one of the site symmetries of the two nonequivalent tetrahedral sites in I4 1 /acd structure loses the center of symmetry with the symmetry reduction from Ia3d to I4 1 /acd, the symmetry reduction may be caused by the electronic polarization of the cations due to the neighboring cation-cation interaction."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1382825895478941059","@type":"Researcher","foaf:name":[{"@value":"Akihiko Nakatsuka"}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895478941057","@type":"Researcher","foaf:name":[{"@value":"Akira Yoshiasa"}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895478941060","@type":"Researcher","foaf:name":[{"@value":"Yamanaka Takamitsu"}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895478941061","@type":"Researcher","foaf:name":[{"@value":"Ohtaka Osamu"}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895478941058","@type":"Researcher","foaf:name":[{"@value":"Katsura Tomoo"}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895478941056","@type":"Researcher","foaf:name":[{"@value":"Eiji Ito"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"0003004X"},{"@type":"PISSN","@value":"http://id.crossref.org/issn/0003004X"}],"prism:publicationName":[{"@value":"American Mineralogist"}],"dc:publisher":[{"@value":"Mineralogical Society of America"}],"prism:publicationDate":"1999-08-01","prism:volume":"84","prism:number":"7-8","prism:startingPage":"1135","prism:endingPage":"1143"},"reviewed":"false","createdAt":"2016-02-02","modifiedAt":"2021-03-04","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360294643757548032","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Incorporation mechanism of Fe and Al into bridgmanite in a subducting mid-ocean ridge basalt and its crystal chemistry"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848656128904448","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Garnets in the majorite–pyrope system: symmetry, lattice microstrain, and order–disorder of cations"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001204088503808","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"隕石と地球深部におけるメージャライトガーネットの秩序－無秩序転移"},{"@language":"en","@value":"Order-Disorder Transition in Majorite Garnet in Shocked Meteorites and Deep Earth's Interior"},{"@language":"ja-Kana","@value":"インセキ ト チキュウ シンブ ニ オケル メージャライトガーネット ノ チツジョ-ムチツジョ テンイ"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206525791616","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Significance of the neighboring cation-cation repulsion in garnet structure."},{"@language":"ja","@value":"ガーネット構造における近接陽イオン間斥力の重要性"},{"@language":"ja-Kana","@value":"ガーネット コウゾウ ニ オケル キンセツ ヨウイオン カン セキリョク ノ ジュウヨウセイ"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942153536512","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Natural and experimental high-pressure, shock-produced terrestrial and extraterrestrial materials"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.2138/am-1999-7-816"},{"@type":"OPENAIRE","@value":"doi_dedup___::8179ccc0c014719597a71d2914ff3241"},{"@type":"CROSSREF","@value":"10.1038/s41598-021-00403-6_references_DOI_Fx3LHKReD1L5ou5VbtEDsyKsit9"},{"@type":"CROSSREF","@value":"10.5940/jcrsj.60.2_references_DOI_Fx3LHKReD1L5ou5VbtEDsyKsit9"},{"@type":"CROSSREF","@value":"10.1007/s00269-016-0852-3_references_DOI_Fx3LHKReD1L5ou5VbtEDsyKsit9"},{"@type":"CROSSREF","@value":"10.2465/gkk.31.25_references_DOI_Fx3LHKReD1L5ou5VbtEDsyKsit9"},{"@type":"CROSSREF","@value":"10.1186/s40645-021-00451-6_references_DOI_Fx3LHKReD1L5ou5VbtEDsyKsit9"}]}