Synthesis of lutetium hydrides at high pressures
High-pressure synthesis of lutetium hydrides from molecular hydrogen (H2) and lutetium (Lu) is systematically investigated using synchrotron X-ray diffraction, Raman spectroscopy, and visual observations. We demonstrate that the reaction pathway between H2 and Lu invariably follows the sequence Lu ⟶...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2025-01-01
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| Series: | Matter and Radiation at Extremes |
| Online Access: | http://dx.doi.org/10.1063/5.0227283 |
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| author | Yuan-Ao Peng Han-Yu Wang Fu-Hai Su Pu Wang Hai-An Xu Lin Liu Lun-Xuan Yu Ross T. Howie Wan Xu Eugene Gregoryanz Xiao-Di Liu |
| author_facet | Yuan-Ao Peng Han-Yu Wang Fu-Hai Su Pu Wang Hai-An Xu Lin Liu Lun-Xuan Yu Ross T. Howie Wan Xu Eugene Gregoryanz Xiao-Di Liu |
| author_sort | Yuan-Ao Peng |
| collection | DOAJ |
| description | High-pressure synthesis of lutetium hydrides from molecular hydrogen (H2) and lutetium (Lu) is systematically investigated using synchrotron X-ray diffraction, Raman spectroscopy, and visual observations. We demonstrate that the reaction pathway between H2 and Lu invariably follows the sequence Lu ⟶ LuH2 ⟶ LuH3 and exhibits a notable time dependence. A comprehensive diagram representing the formation and synthesis of lutetium hydrides as a function of pressure and time is constructed. Our findings indicate that the synthesis can be accelerated by elevated temperature and decelerated by increased pressure. Notably, two critical pressure thresholds at ambient temperature are identified: the synthesis of LuH2 from Lu commences at a minimum pressure of ∼3 GPa, while ∼28 GPa is the minimum pressure at which LuH2 fails to transform into LuH3 within a time scale of months. This underscores the significant impact of temporal factors on synthesis, with the reaction completion time increasing sub-linearly with rising pressure. Furthermore, the cubic phase of LuH3 can be obtained exclusively through compressing the trigonal LuH3 phase at ∼11.5 GPa. We also demonstrate that the bandgap of LuH3 slowly closes under pressure and is noticeably lower than that of LuH2. |
| format | Article |
| id | doaj-art-37b0d91364e546a5a9a3782bd7312e76 |
| institution | Kabale University |
| issn | 2468-080X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | Matter and Radiation at Extremes |
| spelling | doaj-art-37b0d91364e546a5a9a3782bd7312e762025-02-03T16:33:24ZengAIP Publishing LLCMatter and Radiation at Extremes2468-080X2025-01-01101017804017804-710.1063/5.0227283Synthesis of lutetium hydrides at high pressuresYuan-Ao Peng0Han-Yu Wang1Fu-Hai Su2Pu Wang3Hai-An Xu4Lin Liu5Lun-Xuan Yu6Ross T. Howie7Wan Xu8Eugene Gregoryanz9Xiao-Di Liu10University of Science and Technology of China, Hefei 230026, ChinaUniversity of Science and Technology of China, Hefei 230026, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaUniversity of Science and Technology of China, Hefei 230026, ChinaUniversity of Science and Technology of China, Hefei 230026, ChinaUniversity of Science and Technology of China, Hefei 230026, ChinaUniversity of Science and Technology of China, Hefei 230026, ChinaCentre for Science at Extreme Conditions and School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United KingdomKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaHigh-pressure synthesis of lutetium hydrides from molecular hydrogen (H2) and lutetium (Lu) is systematically investigated using synchrotron X-ray diffraction, Raman spectroscopy, and visual observations. We demonstrate that the reaction pathway between H2 and Lu invariably follows the sequence Lu ⟶ LuH2 ⟶ LuH3 and exhibits a notable time dependence. A comprehensive diagram representing the formation and synthesis of lutetium hydrides as a function of pressure and time is constructed. Our findings indicate that the synthesis can be accelerated by elevated temperature and decelerated by increased pressure. Notably, two critical pressure thresholds at ambient temperature are identified: the synthesis of LuH2 from Lu commences at a minimum pressure of ∼3 GPa, while ∼28 GPa is the minimum pressure at which LuH2 fails to transform into LuH3 within a time scale of months. This underscores the significant impact of temporal factors on synthesis, with the reaction completion time increasing sub-linearly with rising pressure. Furthermore, the cubic phase of LuH3 can be obtained exclusively through compressing the trigonal LuH3 phase at ∼11.5 GPa. We also demonstrate that the bandgap of LuH3 slowly closes under pressure and is noticeably lower than that of LuH2.http://dx.doi.org/10.1063/5.0227283 |
| spellingShingle | Yuan-Ao Peng Han-Yu Wang Fu-Hai Su Pu Wang Hai-An Xu Lin Liu Lun-Xuan Yu Ross T. Howie Wan Xu Eugene Gregoryanz Xiao-Di Liu Synthesis of lutetium hydrides at high pressures Matter and Radiation at Extremes |
| title | Synthesis of lutetium hydrides at high pressures |
| title_full | Synthesis of lutetium hydrides at high pressures |
| title_fullStr | Synthesis of lutetium hydrides at high pressures |
| title_full_unstemmed | Synthesis of lutetium hydrides at high pressures |
| title_short | Synthesis of lutetium hydrides at high pressures |
| title_sort | synthesis of lutetium hydrides at high pressures |
| url | http://dx.doi.org/10.1063/5.0227283 |
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