High-Pressure Synthesis and Crystal Structure of B2S3

✍ Scribed by Takeshi Sasaki; Hirotsugu Takizawa; Kyota Uheda; Takahiro Yamashita; Tadashi Endo

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 339 KB
• Volume: 166
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2002.9575

✦ Synopsis

Two new high-pressure phases of binary boron+sulfur compounds, B 2 S 3 -II and B 2 S 3 -III, were synthesized at 3+6.2 GPa. A single crystal of B 2 S 3 -III was grown and the structure was determined (tetragonal, space group I4 1 /a, a ‫؍‬ 16.086(2) A s , c ‫؍‬ 30.488(4) A s ; V ‫؍‬ 7888(1) A s 3 , Z ‫؍‬ 100, R ‫؍‬ 3.0% and R w ‫؍‬ 2.8% for 3047 observed data [I > 3.00 (I)]. The structure of B 2 S 3 -III consists of two kinds of macrotetrahedra built up from 20 and 34 BS 4 -tetrahedra. These macrotetrahedra connect each other to form an interpenetrating zincblende-type structure by sharing BS 4 -tetrahedra at the corners of those. B 2 S 3 -III is anticipated having a rather disordered structure. From the UV-Vis di4use re6ectance spectrum, the optical band gap of B 2 S 3 -III was estimated to be 3.7 eV.

2002 Elsevier Science (USA)