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Sc2B1.1C3.2, a New Rare-Earth Boron Carbide with Graphite-like Layers

✍ Scribed by Ying Shi; A Leithe-Jasper; L Bourgeois; Y Bando; T Tanaka

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 415 KB
Volume: 148
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.1999.8477

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✦ Synopsis

A Sc-based boron carbide Sc 2 B 1.1 C 3.2 with a two-dimensional graphite-like framework has been synthesized by a solid state chemical reaction route. Crystals have been grown successfully and the crystal structure could be assigned to represent a new structure type of rare-earth boron carbides. The trigonal crystal structure (a ‫؍‬ b ‫؍‬ 23.710( 9

form a signi5cantly puckered graphite-like layer in a rather disordered way. The Sc+C+Sc units appear to be rather loosely accommodated between the [B 1/3 C 2/3 ] units. Sc+Sc distances show a very close metal+metal contact. In the Sc+C+Sc units carbon atoms are surrounded by six Sc atoms in the form of a slightly distorted octahedron.

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