Preparation, crystal structure, physical properties and electronic band structure of TIScQ2 (Q = S, Se and Te)

被引：7
|
作者：
Teske, Christoph L. [1 ]
Bensch, Wolfgang [1 ]
Mankovsky, Sergey [2 ]
Ebert, Hubert [2 ]
机构：
[1] Univ Kiel, Inst Anorgan Chem, D-24098 Kiel, Germany
[2] Univ Munich, Dept Chem & Biochem Phys Chem, Munich, Germany
来源：
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 2008年 / 634卷 / 03期
关键词：
thallium; scandium; chalcogenides; crystal structure; electronic band structure;
D O I：
10.1002/zaac.200700440
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The title compounds were prepared by reaction of Tl(2)Q (Q = S, Se and Te) Sc and Q in the temperature range of 200 to 500 degrees C. The structures of the selenide and the telluride adopt the alpha-NaFeO2 type, while TlScS2 crystallizes in the beta-RbScO2 type structure. The space group is Rim for TlSCSe2 and TlScTe2 with a = 3.9370(4) angstrom, c = 23.194(5) angstrom, and a = 4.2129(4) angstrom, c = 24.099(3) angstrom, respectively. The sulphide crystallizes in P6(3)/mmc with a = 3.761(3) angstrom and c = 14.942(4) angstrom. The crystal chemical relations between the three chalcogenides are discussed. According to the electrical measurements and the band structure calculations, the compounds are semiconductors or poor metals.
引用
收藏
页码：445 / 451
页数：7
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