{"@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/1363670319217624064.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1016/0025-5408(80)90217-2"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:0025540880902172?httpAccept=text/xml"}},{"identifier":{"@type":"URI","@value":"https://api.elsevier.com/content/article/PII:0025540880902172?httpAccept=text/plain"}}],"dc:title":[{"@value":"High-pressure modifications of CaAl2O4 and CaGa2O4"}],"description":[{"notation":[{"@value":"Abstract   The modifications of CaAl 2 O 4  and CaGa 2 O 4  with the stuffed tridymite structure were examined under high temperatures (600 ∼ 1500 °C) and high pressures (10 ∼ 40 kb). Calcium monoaluminate CaAl 2 O 4  was found to transform to three kinds of high-pressure modifications. The original CaAl 2 O 4  (CA-I) changed to the phase CA-II which had m-CaGa 2 O 4  type structure with a different array of tetrahedra in the six-membered rings of tetrahedron. The phase CA-II transformed either to the phase CA-IV with CaFe 2 O 4  type structure or to an unknown phase (CA-III) under high pressures. The phase CA-IV was obtained under the pressures above 30 kb and at the temperatures above 1000 °C. Calcium monogallate CaGa 2 O 4  transformed to the CaFe 2 O 4  type structure above 30kb and 700 °C. No phases such as CA-II and CA-III were found. The structural relations among these modifications were discussed."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380857593666961795","@type":"Researcher","foaf:name":[{"@value":"S. Ito"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319217624065","@type":"Researcher","foaf:name":[{"@value":"K. Suzuki"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319217624067","@type":"Researcher","foaf:name":[{"@value":"M. Inagaki"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319217624064","@type":"Researcher","foaf:name":[{"@value":"S. Naka"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00255408"}],"prism:publicationName":[{"@value":"Materials Research Bulletin"}],"dc:publisher":[{"@value":"Elsevier BV"}],"prism:publicationDate":"1980-07","prism:volume":"15","prism:number":"7","prism:startingPage":"925","prism:endingPage":"932"},"reviewed":"false","dc:rights":["https://www.elsevier.com/tdm/userlicense/1.0/"],"url":[{"@id":"https://api.elsevier.com/content/article/PII:0025540880902172?httpAccept=text/xml"},{"@id":"https://api.elsevier.com/content/article/PII:0025540880902172?httpAccept=text/plain"}],"createdAt":"2003-06-21","modifiedAt":"2019-03-19","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360567185713955968","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Ca‐Al‐Fe‐rich inclusion in the Vigarano CV3 chondrite"}]},{"@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":"10.1016/0025-5408(80)90217-2"},{"@type":"OPENAIRE","@value":"doi_dedup___::0f6d0933259e8e0e523d96deb2a5f28f"},{"@type":"CROSSREF","@value":"10.1111/j.1945-5100.2011.01183.x_references_DOI_MP00jmoXXOS7FwQ8VvhTTdpaoql"},{"@type":"CROSSREF","@value":"10.1186/s40645-021-00451-6_references_DOI_MP00jmoXXOS7FwQ8VvhTTdpaoql"}]}