Year: 2026
Type: article
Abstract: The high-pressure structural evolution of Gd2Ce2O7 has been studied by synchrotron X-ray diffraction (up to 31.8 GPa) and Raman spectroscopy (up to 38.9 GPa). A pressure-induced phase transition from cubic (space group Ia-3) to monoclinic (C2/m) crystal structure was observed to initiate at 11.3 GPa. This transition was primarily driven by the compression-induced cation rearrangement, which significantly altered the local coordination environment. The structural transformation proceeded via a gradual, continuous pathway and persisted up to the maximum experimental pressure of 31.8 GPa. Notably, the high-pressure phase remains stable upon complete decompression, confirming an irreversible structural transformation of Gd2Ce2O7.
Source: Materials
DOI: 10.3390/ma19081615
Authors: Tao Lv, Jia Qv, Limin Yan, Yan Li, Qiang Tao, Pinwen Zhu, Xin Wang
Language: English
Subfield: Geophysics
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
OpenAlex ID: W7154750462