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High-pressure synthesis of dysprosium carbides.

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.

SUBMITTER: Akbar FI

PROVIDER: S-EPMC10296199 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature

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High-pressure synthesis of dysprosium carbides.

Akbar Fariia Iasmin FI Aslandukova Alena A Aslandukov Andrey A Yin Yuqing Y Trybel Florian F Khandarkhaeva Saiana S Fedotenko Timofey T Laniel Dominique D Bykov Maxim M Bykova Elena E Dubrovinskaia Natalia N Dubrovinsky Leonid L

Frontiers in chemistry 20230613

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 Dy4</s ...[more]

PMID: 37383952

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