Neutron Powder Diffraction on Ce11B2C2 and Nd11B2C2: A New Model for the Tetragonal Crystal Structure

Takahiro Onimaru, Hideya Onodera, Kenji Ohoyama, Hiroki Yamauchi, Yasuo Yamaguchi

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)

Abstract

Crystal structures of CeB2C2 and NdB2C2 were investigated by means of neutron powder diffraction using 11B enriched samples. Diffraction patterns of Ce11B2C2 and Nd11B2C2 are very similar to each other, and Rietveld analyses reveal that the crystal structure belongs to a symmetry group of tetragonal P4/mbm, where the rare earth atoms occupy 2(a) sites and the B and C atoms occupy two 4(h) sites with different positional parameters. The newly determined structure differs from previously reported ones with P4/mbm and P42c mainly in the site positions occupied by the B and C atoms. The B and C atoms form network planes consisting of non-regular squares and octagons.

Original languageEnglish
Pages (from-to)2287-2291
Number of pages5
Journaljournal of the physical society of japan
Volume68
Issue number7
DOIs
Publication statusPublished - 1999 Jan 1

Keywords

  • B
  • CeBC
  • Crystal structure
  • NdBC
  • Neutron diffraction

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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