Data from: Pressure-Induced Order-Disorder Transition in Gd1.5Ce0.5Ti2O7 Pyrochlore
收藏DataCite Commons2025-04-01 更新2025-04-10 收录
下载链接：
https://datadryad.org/dataset/doi:10.5061/dryad.14g7bk7
下载链接
链接失效反馈官方服务：
资源简介：
An experimental study on ordered pyrochlore structured Gd1.5Ce0.5Ti2O7
(Fd-3m) 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 ~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 rA/rB may also be effective for predicting
the pyrochlore oxides’ high-pressure stability. In addition, two
isostructural transitions of Gd1.5Ce0.5Ti2O7 are observed at 6.5 GPa and
13 GPa, and their unit-cell volumes as a function of pressure demonstrate
that the compression behavior is rather complex.
提供机构：
Dryad
创建时间：
2019-08-15
