Wenming Qi, Anwar Hushur, Lin He, Rabigul Tursun, Min Gao
{"title":"Pressure-Induced Successive Phase Transitions and Optical Properties in Lu2SiO5","authors":"Wenming Qi, Anwar Hushur, Lin He, Rabigul Tursun, Min Gao","doi":"10.1002/adpr.202300319","DOIUrl":null,"url":null,"abstract":"<p>Herein, lutecium silicate is used as a rock example to investigate its two high-pressure phases (7.4 GPa: HP-II and 25.3 GPa: HP-III) and lattice dynamics by in situ high-pressure Raman scattering up to 35.1 GPa. The evidence for a highly symmetrical insulator HP-III phase is obtained. Importantly, the high-pressure structure (metastable phases) after pressure quenching is also intercepted, indicating pressure-induced permanent densification. These findings provide Raman evidence for pressure-induced successive phase transitions of highly symmetric insulators intercepted in prototype Lu<sub>2</sub>SiO<sub>5</sub> and physical insights to explain the self-regulation of rare earth-rich regions in facilitating highly effective global carbon cycling.</p>","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":null,"pages":null},"PeriodicalIF":3.7000,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202300319","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Photonics Research","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/adpr.202300319","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Herein, lutecium silicate is used as a rock example to investigate its two high-pressure phases (7.4 GPa: HP-II and 25.3 GPa: HP-III) and lattice dynamics by in situ high-pressure Raman scattering up to 35.1 GPa. The evidence for a highly symmetrical insulator HP-III phase is obtained. Importantly, the high-pressure structure (metastable phases) after pressure quenching is also intercepted, indicating pressure-induced permanent densification. These findings provide Raman evidence for pressure-induced successive phase transitions of highly symmetric insulators intercepted in prototype Lu2SiO5 and physical insights to explain the self-regulation of rare earth-rich regions in facilitating highly effective global carbon cycling.