Synthesis, structure and properties of Li2Rh3B2

✍ Scribed by Mark S. Bailey; Emil B. Lobkovsky; David G. Hinks; Helmut Claus; Yew San Hor; John A. Schlueter; John F. Mitchell

• Book ID: 104029857
• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 324 KB
• Volume: 180
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2007.02.006

✦ Synopsis

Li 2 Rh 3 B 2 has been synthesized at 1000 1C from a stoichiometric mix of rhodium and boron and an excess of lithium. Li 2 Rh 3 B 2 crystallizes in the orthorhombic space group Pbam (no. 55, Z ¼ 2) with room temperature lattice constants a ¼ 5.7712(1) A ˚, b ¼ 9.4377(2) A ˚, c ¼ 2.8301(1) A ˚and cell volume 154.149(6) A ˚3. The structure was solved from single crystal X-ray diffraction yielding the final R indices (all data) R1 ¼ 2.8% and wR2 ¼ 4.7%. The structure is a distortion of the CeCo 3 B 2 structure type, containing a network of Rh 6 B trigonal prisms and short Li-Li contacts of 2.28(2) A ˚. Li 2 Rh 3 B 2 is a diamagnetic metal with a room temperature resistivity of 19 mO cm, as determined by magnetic susceptibility and single crystal transport measurements. The measured diamagnetism and electronic structure calculations show that Li 2 Rh 3 B 2 contains rhodium in a d 10 configuration.