Crystal Growth and Structure Analysis of a New Scandium Aluminum Boride Sc2AlB6

✍ Scribed by Shigeru Okada; Takaho Tanaka; A. Leithe-Jasper; Yuichi Michiue; Vladimir N. Gurin

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 216 KB
• Volume: 154
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8810

✦ Synopsis

Single crystals of a new ternary boride Sc 2 AlB 6 were obtained from the Sc+Al+B system using high-temperature Al melts under an argon atmosphere. The growth conditions for large crystals were established. Sc 2 AlB 6 crystals were obtained in the form of needle-like rectangles extending along the direction of the b axis or in the form of thick platelets with large c planes. The crystals were examined by powder X-ray di4raction and chemical analyses, and the crystal structure of Sc 2 AlB 6 was investigated by single-crystal X-ray di4ractometry. The crystal structure of Sc 2 AlB 6 is of the Y 2 ReB 6 type with the space group Pbam and the unit cell parameters are a ‫؍‬ 0.8937(3) nm, b ‫؍‬ 1.1226(3) nm, c ‫؍‬ 0.3433(1) nm, V ‫؍‬ 344.4(1) ؋ 10 ؊3 nm 3 , Z ‫؍‬ 4. The structure re5nement converged at an R(F 2 ) value of 0.046 for 1545 re6ections. The structural characteristics of Sc 2 AlB 6 are discussed.