Wenming Qi, Anwar Hushur, Lin He, Rabigul Tursun, Min Gao
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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.
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