at Google ScholarTitle data
Aslandukova, Alena ; Aslandukov, Andrii ; Laniel, Dominique ; Yin, Yuqing ; Akbar, Fariia Iasmin ; Bykov, Maxim ; Fedotenko, Timofey ; Glazyrin, Konstantin ; Pakhomova, Anna ; Garbarino, Gaston ; Bright, Eleanor Lawrence ; Wright, Jonathan ; Hanfland, Michael ; Chariton, Stella ; Prakapenka, Vitali ; Dubrovinskaia, Natalia ; Dubrovinsky, Leonid:
Diverse high-pressure chemistry in Y-NH₃BH₃ and Y–paraffin oil systems.
In: Science Advances.
Vol. 10
(2024)
Issue 11
.
- eadl5416.
ISSN 2375-2548
DOI: https://doi.org/10.1126/sciadv.adl5416
Project information
| Project title: |
Project's official title Project's id Hochdrucksynthese neuartiger Stickstoff (N)-Halogen (Hal)-Verbindungen: binäre N-Hal und ternäre H-N-Hal (Hal = F, Cl, Br, I) 526080028 FOR 2440: Materie im Inneren von Planeten - Hochdruck-, Planeten- und Plasmaphysik 280637173 FOR 2125: "Structures, properties and reactions of carbonates at high temperatures and pressures" 242495784 Grundlegendes Verständnis der Elektronenübergänge in Metallen und Legierungen der Platingruppe durch Hochdruckexperimente und ab initio Theorien 338621729 Open Access Publizieren No information |
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| Project financing: |
Deutsche Forschungsgemeinschaft |
Abstract in another language
The yttrium-hydrogen system has gained attention because of near-ambient temperature superconductivity reports in yttrium hydrides at high pressures. We conducted a study using synchrotron single-crystal x-ray diffraction (SCXRD) at 87 to 171 GPa, resulting in the discovery of known (two YH₃ phases) and five previously unknown yttrium hydrides. These were synthesized in diamond anvil cells by laser heating yttrium with hydrogen-rich precursors-ammonia borane or paraffin oil. The arrangements of yttrium atoms in the crystal structures of new phases were determined on the basis of SCXRD, and the hydrogen content estimations based on empirical relations and ab initio calculations revealed the following compounds: Y₃H₁₁, Y₂H₉, Y₄H₂₃, Y₁₃H₇₅, and Y₄H₂₅. The study also uncovered a carbide (YC₂) and two yttrium allotropes. Complex phase diversity, variable hydrogen content in yttrium hydrides, and their metallic nature, as revealed by ab initio calculations, underline the challenges in identifying superconducting phases and understanding electronic transitions in high-pressure synthesized materials. Single-crystal XRD supported by theoretical calculations reveals the formation of seven yttrium hydrides at high pressures.