R-dependency of the hardness of Perovskite-type RRh3B compounds (R = La, Gd, Lu and Sc)

Toetsu Shishido, Kunio Kudou, Shigeru Okada, Jinhua Ye, Akira Yoshikawa, Takahiko Sasaki, Masaoki Oku, Hiroyuki Horiuchi, Iwami Higashi, Shigemi Kohiki, Yoshiyuki Kawazoe, Kazuo Nakajima

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13 Citations (Scopus)


Perovskite-type rare-earth rhodium borides of the chemical formula RRh3B (R = La, Gd, Lu and Sc) have been studied from the viewpoint of microhardness. Polycrystals of RRh3B are synthesized by the arc melting method. RRh3B compounds have a perovskite-type cubic structure (space group: Pm3̄m). The microhardness become larger with the contraction of the volume of the Rh6B octahedron in the perovskite-type structure. As a result, microhardness increases with decreasing atomic size of R in RRh3B.

Original languageEnglish
Pages (from-to)6037-6038
Number of pages2
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Issue number10
Publication statusPublished - 2001 Oct


  • Hardness
  • Perovskite-type compound
  • RRhB (Ln = La, Gd, Lu and Sc)
  • Rare-earth rhodium boride

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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