Ternary Antimonide EuSn3Sb4 and Related Metallic Zintl Phases

✍ Scribed by Robert Lam; Jingjun Zhang; Arthur Mar

• Book ID: 102605753
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 266 KB
• Volume: 150
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1999.8609

✦ Synopsis

The ternary Zintl compound europium tin antimonide, EuSn 3 Sb 4 , has been synthesized at 9003C in the presence of a tin 6ux, and its structure has been determined by single-crystal X-ray di4raction methods. It crystallizes in the orthorhombic space group D 16 2h -Pnma with a ‫؍‬ 9.954(2), b ‫؍‬ 4.3516(7), c ‫؍‬ 22.650(4) A > , and Z ‫؍‬ 4 at 223C. EuSn 3 Sb 4 is isostructural to SrSn 3 Sb 4 ; it possesses channels de5ned by an anionic framework of shared SnSb 4 tetrahedra, SnSb 3 trigonal pyramids, and Sb+Sb zigzag chains, and it is 5lled by Eu 2؉ cations. Resistivity measurements indicate weakly metallic behavior for ASn 3 Sb 4 (A ‫؍‬ Eu, Sr) and the structurally related Ba 2 Sn 3 Sb 6 . The anisotropic metallic nature of these compounds is explained through extended HuK ckel band structure calculations.