Crystal Structure and Bonding in the Rare-Earth Rich Ternary Pnictides RE5M2X (RE=Y, Gd, Tb, Dy, Ho, Er, Tm, Lu; M=Ni, Pd; X=Sb, Bi)

✍ Scribed by Yurij Mozharivskyj; Hugo F. Franzen

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 316 KB
• Volume: 152
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8716

✦ Synopsis

Eleven new rare-earth antimonides and bismuthides RE 5 M 2 X (see Table 1) have been synthesized and characterized by X-ray powder methods. The compounds are isostructural to the previously reported pnictides RE 5 M 2 X and adopt the Mo 5 B 2 Si structure (space group I4/mcm, an ordered version of Cr 5 B 3 ). Atomic and thermal parameters have been re5ned for Ho 5 Ni 2 Sb and Ho 5 Ni 2 Bi. Extended HuK ckel tight-binding calculations performed on Y 5 Ni 2 Sb show strong Y+Ni, Y+Sb, and Y+Y interactions.