Preparation, Crystal Structure, Physical Properties and Electronic Band Structure of TlScQ2 (Q = S, Se and Te)
作者:Christoph L. Teske、Wolfgang Bensch、Sergey Mankovsky、Hubert Ebert
DOI:10.1002/zaac.200700440
日期:2008.3
The title compounds were prepared by reaction of Tl2Q (Q = S, Se and Te) Sc and Q in the temperature range of 200 to 500 °C. The structures of the selenide and the telluride adopt the α-NaFeO2 type, while TlScS2 crystallizes in the β-RbScO2 type structure. The space group is for TlScSe2 and TlScTe2 with a = 3.9370(4) A, c = 23.194(5) A, and a = 4.2129(4) A, c = 24.099(3) A, respectively. The sulphide
标题化合物通过 Tl2Q (Q = S、Se 和 Te) Sc 和 Q 在 200 至 500°C 的温度范围内反应制备。硒化物和碲化物的结构采用α-NaFeO2型,而TlScS2结晶为β-RbScO2型结构。TlScSe2 和 TlScTe2 的空间群分别为 a = 3.9370 (4) A、c = 23.194 (5) A 和 a = 4.2129 (4) A、c = 24.099 (3) A。硫化物以 P63 / mmc 结晶,a = 3.761 (3) A 和 c = 14.942 (4) A。讨论了三种硫属元素化物之间的晶体化学关系。根据电学测量和能带结构计算,这些化合物是半导体或贫金属。