High-pressure synthesis and crystal structure of B2S3

被引：15
作者：
Sasaki, T [1 ]
Takizawa, H [1 ]
Uheda, K [1 ]
Yamashita, T [1 ]
Endo, T [1 ]
机构：
[1] Tohoku Univ, Grad Sch Engn, Dept Chem Mat, Sendai, Miyagi 9808579, Japan
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2002年 / 166卷 / 01期
关键词：
boron sulfide; high pressure; crystal structure; macrotetrahedron;
D O I：
10.1006/jssc.2002.9575
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Two new high-pressure phases of binary boron-sulfur compounds, B2S3-II and B2S3-III, were synthesized at 3-6.2 GPa. A single crystal of B2S3-III was grown and the structure was determined (tetragonal, space group I4(1)/a, a = 16.086(2),Angstrom, c = 30.488(4)Angstrom; V = 7888(l) Angstrom(3), Z = 100, R = 3.0% and R-w = 2.8% for 3047 observed data [I > 3.00sigma (I)]. The structure of B2S3-III consists of two kinds of macrotetrahedra built up from 20 and 34 BS4-tetrahedra. These macrotetrahedra connect each other to form an interpenetrating zincblende-type structure by sharing BS4-tetrahedra at the corners of those. B2S3-III is anticipated having a rather disordered structure. From the UV-Vis diffuse reflectance spectrum, the optical band gap of B2S3-III was estimated to be 3.7 eV. (C) 2002 Elsevier Science (USA).
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页码：164 / 170
页数：7
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