The high-pressure lithium–palladium and lithium–palladium–hydrogen systems
Abstract The lithium–palladium and lithium–palladium–hydrogen systems are investigated at high pressures at and above room temperature. Two novel lithium–palladium compounds are found below $${18.7}\,{\mathrm{GPa}}$$ 18.7 GPa . An ambient temperature phase is tentatively assigned as $$F{\bar{4}}3m\,...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-07-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-16694-2 |
| _version_ | 1818192864765542400 |
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| author | Mungo Frost Emma E. McBride Jesse S. Smith Siegfried H. Glenzer |
| author_facet | Mungo Frost Emma E. McBride Jesse S. Smith Siegfried H. Glenzer |
| author_sort | Mungo Frost |
| collection | DOAJ |
| description | Abstract The lithium–palladium and lithium–palladium–hydrogen systems are investigated at high pressures at and above room temperature. Two novel lithium–palladium compounds are found below $${18.7}\,{\mathrm{GPa}}$$ 18.7 GPa . An ambient temperature phase is tentatively assigned as $$F{\bar{4}}3m\,\hbox {Li}_{17}\hbox {Pd}_{4}$$ F 4 ¯ 3 m Li 17 Pd 4 , with $$a = 17.661(1)$$ a = 17.661 ( 1 ) Å at 8.64 GPa, isostructural with $$\hbox {Li}_{17}\hbox {Sn}_{4}$$ Li 17 Sn 4 . The other phase occurs at high-temperature and is $$I{\bar{4}}3m\, \hbox {Li}_{11}\hbox {Pd}_{2}$$ I 4 ¯ 3 m Li 11 Pd 2 , $$a = 9.218(1)$$ a = 9.218 ( 1 ) Å at 3.88 GPa and 200 $$^\circ {\mathrm{C}}$$ ∘ C , similar to $$\hbox {Li}_{11}\hbox {Pt}_{2}$$ Li 11 Pt 2 , which is also known at high pressure. The presence of hydrogen in the system results in an $$I{\bar{4}}3m$$ I 4 ¯ 3 m structure with $$a = 8.856(1)$$ a = 8.856 ( 1 ) Å at 9.74 GPa. This persists up to $${13.3}\,\mathrm{GPa}$$ 13.3 GPa , the highest pressure studied. Below $${2}\,{\mathrm{GPa}}$$ 2 GPa an fcc phase with a large unit cell, $$a = 19.324(1)$$ a = 19.324 ( 1 ) Å at 0.39 GPa, is also observed in the presence of hydrogen. On heating the hydrogen containing system at 4 GPa the $$I{\bar{4}}3m$$ I 4 ¯ 3 m phases persists to the melting point of lithium. In both systems melting the lithium results in the loss of crystalline diffraction from palladium containing phases. This is attributed to dissolution of the palladium in the molten lithium, and on cooling the palladium remains dispersed. |
| first_indexed | 2024-12-12T00:37:17Z |
| format | Article |
| id | doaj.art-0401b8975d7a4933b4a1689aafc9bfc1 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-12T00:37:17Z |
| publishDate | 2022-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-0401b8975d7a4933b4a1689aafc9bfc12022-12-22T00:44:20ZengNature PortfolioScientific Reports2045-23222022-07-0112111110.1038/s41598-022-16694-2The high-pressure lithium–palladium and lithium–palladium–hydrogen systemsMungo Frost0Emma E. McBride1Jesse S. Smith2Siegfried H. Glenzer3High Energy Density Science Division, SLAC National Accelerator LaboratoryHigh Energy Density Science Division, SLAC National Accelerator LaboratoryHigh Pressure Collaborative Access Team, X-ray Science Division, Argonne National LaboratoryHigh Energy Density Science Division, SLAC National Accelerator LaboratoryAbstract The lithium–palladium and lithium–palladium–hydrogen systems are investigated at high pressures at and above room temperature. Two novel lithium–palladium compounds are found below $${18.7}\,{\mathrm{GPa}}$$ 18.7 GPa . An ambient temperature phase is tentatively assigned as $$F{\bar{4}}3m\,\hbox {Li}_{17}\hbox {Pd}_{4}$$ F 4 ¯ 3 m Li 17 Pd 4 , with $$a = 17.661(1)$$ a = 17.661 ( 1 ) Å at 8.64 GPa, isostructural with $$\hbox {Li}_{17}\hbox {Sn}_{4}$$ Li 17 Sn 4 . The other phase occurs at high-temperature and is $$I{\bar{4}}3m\, \hbox {Li}_{11}\hbox {Pd}_{2}$$ I 4 ¯ 3 m Li 11 Pd 2 , $$a = 9.218(1)$$ a = 9.218 ( 1 ) Å at 3.88 GPa and 200 $$^\circ {\mathrm{C}}$$ ∘ C , similar to $$\hbox {Li}_{11}\hbox {Pt}_{2}$$ Li 11 Pt 2 , which is also known at high pressure. The presence of hydrogen in the system results in an $$I{\bar{4}}3m$$ I 4 ¯ 3 m structure with $$a = 8.856(1)$$ a = 8.856 ( 1 ) Å at 9.74 GPa. This persists up to $${13.3}\,\mathrm{GPa}$$ 13.3 GPa , the highest pressure studied. Below $${2}\,{\mathrm{GPa}}$$ 2 GPa an fcc phase with a large unit cell, $$a = 19.324(1)$$ a = 19.324 ( 1 ) Å at 0.39 GPa, is also observed in the presence of hydrogen. On heating the hydrogen containing system at 4 GPa the $$I{\bar{4}}3m$$ I 4 ¯ 3 m phases persists to the melting point of lithium. In both systems melting the lithium results in the loss of crystalline diffraction from palladium containing phases. This is attributed to dissolution of the palladium in the molten lithium, and on cooling the palladium remains dispersed.https://doi.org/10.1038/s41598-022-16694-2 |
| spellingShingle | Mungo Frost Emma E. McBride Jesse S. Smith Siegfried H. Glenzer The high-pressure lithium–palladium and lithium–palladium–hydrogen systems Scientific Reports |
| title | The high-pressure lithium–palladium and lithium–palladium–hydrogen systems |
| title_full | The high-pressure lithium–palladium and lithium–palladium–hydrogen systems |
| title_fullStr | The high-pressure lithium–palladium and lithium–palladium–hydrogen systems |
| title_full_unstemmed | The high-pressure lithium–palladium and lithium–palladium–hydrogen systems |
| title_short | The high-pressure lithium–palladium and lithium–palladium–hydrogen systems |
| title_sort | high pressure lithium palladium and lithium palladium hydrogen systems |
| url | https://doi.org/10.1038/s41598-022-16694-2 |
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