Revealing the Pressure-Induced Phase Transformation of Xenotime TbPO 4 via In Situ Photoluminescence Spectroscopy
The pressure-induced phase transformations of certain rare earth (RE) orthophosphates have attracted broad interest from geoscience to structural ceramics. Studying these transformations has required Raman spectroscopy or synchrotron X-ray diffraction (XRD), each of which suffers from poor signal or...
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| Published in | The journal of physical chemistry letters Vol. 15; no. 16; pp. 4294 - 4300 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
25.04.2024
|
| Online Access | Get full text |
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| Summary: | The pressure-induced phase transformations of certain rare earth (RE) orthophosphates have attracted broad interest from geoscience to structural ceramics. Studying these transformations has required
Raman spectroscopy or synchrotron X-ray diffraction (XRD), each of which suffers from poor signal or limited accessibility, respectively. This study exploits the photoluminescence (PL) of Tb
ions and the unique sensitivity of PL to the local bonding environment to interrogate the symmetry-reducing xenotime-monazite phase transformation of TbPO
. At pressures consistent with the XRD-based phase transformation onset pressure of 8.7(6) GPa, PL spectra show new peaks emerging as well as trend changes in the centroids and intensity ratios of certain PL bands. Furthermore, PL spectra of recovered samples show transformation is irreversible. Hysteresis in certain PL band intensity ratios also reveals the stress history in TbPO
. This
PL approach can be applied to probe pressure-induced transformations and crystal field distortions in other RE-based oxide compounds. |
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| ISSN: | 1948-7185 1948-7185 |
| DOI: | 10.1021/acs.jpclett.4c00196 |