Crystal structure of tetragonal Ce11B2C2

✍ Scribed by T. Onimaru; H. Onodera; K. Ohoyama; H. Yamauchi; M. Ohashi; Y. Yamaguchi

• Book ID: 104152078
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 121 KB
• Volume: 60
• Category: Article
• ISSN: 0022-3697
• DOI: 10.1016/s0022-3697(99)00156-0

✦ Synopsis

Neutron powder diffraction experiments were performed in order to determine the crystal structure of Ce 11 B 2 C 2 , since the structure of CeB 2 C 2 has been examined only by X-ray techniques and the positions of the B and C atoms in this compound are suspicious. The neutron diffraction pattern reveals that the crystal structure of Ce 11 B 2 C 2 has a symmetry with the space group of P4/mbm, where the Ce atoms occupy the 2(a) sites (0,0,0) and the B and C atoms 4(h) sites (x,x ϩ 0.5,0.5) with positional parameters of x B 0.361(1) and x C 0.160(1) at 15.0 K.