Pressure-induced order-disorder transition in Gd1.5Ce0.5Ti2O7 pyrochlore | |
Niu, JJ (Niu, Jingjing)1,2,3,4; Wu, X (Wu, Xiang)5; Zhang, HB (Zhang, Haibin)4; Qin, S (Qin, Shan)2,3 | |
Source Publication | ROYAL SOCIETY OPEN SCIENCE |
2019 | |
Volume | 6Issue:9Pages:190842 |
DOI | 10.1098/rsos.190842 |
Abstract | An experimental study on ordered pyrochlore structured Gd1.5Ce0.5Ti2O7 (Fd3m) was carried out up to 45 GPa by synchrotron radiation X-ray diffraction and Raman spectroscopy. Experimental results show that Gd1.5Ce0.5Ti2O7 transfers to a disordered cotunnite-like phase (Pnma Z = 4) at approximately 42 GPa. Compared with the end member Gd2Ti2O7, the substitution of Ce3+ for Gd3+ increases the transition pressure and the high-pressure stability of the pyrochlore phase. This pressure-induced structure transition is mainly controlled by cationic order-disorder modification, and the cationic radius ratio r(A)/r(B) may also be effective for predicting the pyrochlore oxides' high-pressure stability. Two isostructural transitions are observed at 6.5 GPa and 13 GPa, and the unit-cell volume of Gd1.5Ce0.5Ti2O7 as a function of pressure demonstrates its compression behaviour is rather complex. |
Subject Area | Geosciences |
WOS ID | WOS:000488745800039 |
Language | 英语 |
Indexed By | SCI |
Keyword | Rare-earth Titanates Gd |
WOS Research Area | Science & Technology - Other Topics |
WOS Subject | Multidisciplinary Sciences |
Cooperation Status | 国内 |
ISSN | 2054-5703 |
Department | 大陆碰撞与高原隆升重点实验室 |
URL | 查看原文 |
Publisher | ROYAL SOC |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.itpcas.ac.cn/handle/131C11/9168 |
Collection | 图书馆 |
Corresponding Author | Niu, JJ (Niu, Jingjing) |
Affiliation | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China; 2.Peking Univ, MOE, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China; 3.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China; 4.China Acad Engn Phys, Inst Nucl Phys & Chem, Innovat Res Team Adv Ceram, Mianyang 621900, Sichuan, Peoples R China; 5.China Univ Geosci Wuhan, 5Tate Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Hubei, Peoples R China. |
Recommended Citation GB/T 7714 | Niu, JJ ,Wu, X ,Zhang, HB ,et al. Pressure-induced order-disorder transition in Gd1.5Ce0.5Ti2O7 pyrochlore[J]. ROYAL SOCIETY OPEN SCIENCE,2019,6(9):190842. |
APA | Niu, JJ ,Wu, X ,Zhang, HB ,&Qin, S .(2019).Pressure-induced order-disorder transition in Gd1.5Ce0.5Ti2O7 pyrochlore.ROYAL SOCIETY OPEN SCIENCE,6(9),190842. |
MLA | Niu, JJ ,et al."Pressure-induced order-disorder transition in Gd1.5Ce0.5Ti2O7 pyrochlore".ROYAL SOCIETY OPEN SCIENCE 6.9(2019):190842. |
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