High-pressure synthesis of dysprosium carbides

Fariia Iasmin Akbar; Alena Aslandukova; Andrey Aslandukov; Yuqing Yin; Florian Trybel; Saiana Khandarkhaeva; Timofey Fedotenko; Dominique Laniel; Maxim Bykov; Elena Bykova; Natalia Dubrovinskaia; Leonid Dubrovinsky

doi:10.3389/fchem.2023.1210081

High-pressure synthesis of dysprosium carbides

Front Chem. 2023 Jun 13:11:1210081. doi: 10.3389/fchem.2023.1210081. eCollection 2023.

Authors

Fariia Iasmin Akbar^{1

2}, Alena Aslandukova¹, Andrey Aslandukov^{1

2}, Yuqing Yin^{1

3}, Florian Trybel⁴, Saiana Khandarkhaeva¹, Timofey Fedotenko⁵, Dominique Laniel⁶, Maxim Bykov⁷, Elena Bykova², Natalia Dubrovinskaia^{1

4}, Leonid Dubrovinsky²

Affiliations

¹ Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, Bayreuth, Germany.
² Bayerisches Geoinstitut, University of Bayreuth, Bayreuth, Germany.
³ State Key Laboratory of Crystal Materials, Shandong University, Jinan, China.
⁴ Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, Sweden.
⁵ Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany.
⁶ Centre for Science at Extreme Conditions and School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom.
⁷ Institute of Inorganic Chemistry, University of Cologne, Cologne, Germany.

Abstract

Chemical reactions between dysprosium and carbon were studied in laser-heated diamond anvil cells at pressures of 19, 55, and 58 GPa and temperatures of ∼2500 K. In situ single-crystal synchrotron X-ray diffraction analysis of the reaction products revealed the formation of novel dysprosium carbides, Dy₄C₃ and Dy₃C₂, and dysprosium sesquicarbide Dy₂C₃ previously known only at ambient conditions. The structure of Dy₄C₃ was found to be closely related to that of dysprosium sesquicarbide Dy₂C₃ with the Pu₂C₃-type structure. Ab initio calculations reproduce well crystal structures of all synthesized phases and predict their compressional behavior in agreement with our experimental data. Our work gives evidence that high-pressure synthesis conditions enrich the chemistry of rare earth metal carbides.

Keywords: carbides; diamond anvil cell; dysprosium carbide; high-pressure; lanthanides carbides; rare-earth carbides; rare-earth elements.

Grants and funding

The work was financially supported by the following agencies: the Federal Ministry of Education and Research, Germany (BMBF, Grant No. 05K19WC1), the Deutsche Forschungsgemeinschaft (DFG projects DU 954–11/1, DU 393–9/2, and DU 393–13/1), the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linköping University (Faculty Grant SFO-Mat-LiU No. 2009 00971). DL thanks the UKRI Future Leaders Fellowship (MR/V025724/1) for financial support.