Article Phase stability of solid solution La1-RRh3B (R = Gd, Lu and Sc) compounds with cubic anti-perovskite type structure

Kunio Yubuta ; Akiko Nomura ; Kaoru Kouzu ; Takao Mori SAMURAI ORCID (National Institute for Materials Science) ; Shigeru Okada ; Toetsu Shishido

MDR--Phase stability of solid solution La1-xRxRh3B (R = Gd, Lu and Sc) with cubic anti-perovskite type structure.pdf
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Kunio Yubuta, Akiko Nomura, Kaoru Kouzu, Takao Mori, Shigeru Okada, Toetsu Shishido. Phase stability of solid solution La1-RRh3B (R = Gd, Lu and Sc) compounds with cubic anti-perovskite type structure. SOLID STATE SCIENCES. 2024, 158 (), 107731. https://doi.org/10.1016/j.solidstatesciences.2024.107731
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(abstract)

We have investigated the solid solution range of single phase La1-xRxRh3B (R = Gd, Lu and Sc) compounds with a cubic anti-perovskite type structure. The behaviors of lattice parameters, hardness, and thermogravimetry–differential thermal analysis (TG-DTA) were also investigated. The cubic anti-perovskite phase exists over the entire composition range x from 0.0 to 1.0 for all La-Gd, La-Lu and La-Sc systems. Both the lattice parameters and the hardness in all La-Gd, La-Lu and La-Sc systems show a linear dependence on the degree of the substitution x of La atom. The results of TG-DTA measurements indicate that oxidation of the compound in air begins at about 500-600 K. The mixed phases of RBO3, R2O3 and Rh are identified as oxidized products around x = 0.5. The oxidation onset temperature, and weight gains due to the oxidation depend on the degree of substitution x. The behavior of crystallographic and physical/chemical properties in the present compounds La1-xRxRh3B strongly depend on the atomic size of the rare-earth atoms that form the cubic framework.

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Keyword: boride

Date published: 2024-10-23

Publisher: Elsevier BV

Journal:

  • SOLID STATE SCIENCES (ISSN: 12932558) vol. 158 107731

Funding:

  • Japan Science and Technology Agency
  • Institute for Materials Research, Tohoku University
  • Japan Society for the Promotion of Science 202212-CRKKE-0020
  • Japan Society for the Promotion of Science JP20H05258
  • Japan Society for the Promotion of Science JP23K04373
  • Japan Society for the Promotion of Science 202311-RDKGE-0001
  • Japan Society for the Promotion of Science 202211-RDKGE-0008
  • Japan Society for the Promotion of Science JP19K05643
  • JST-Mirai Program JPMJMI19A1

Manuscript type: Author's version (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5123

First published URL: https://doi.org/10.1016/j.solidstatesciences.2024.107731

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Updated at: 2024-12-10 16:55:38 +0900

Published on MDR: 2024-12-10 16:55:38 +0900

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