Structure and Electrical Conductivity of AgTaS3

✍ Scribed by Changkeun Kim; Hoseop Yun; Youngju Lee; Heekyoon Shin; Kwangkyoung Liou

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 260 KB
• Volume: 132
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1997.7478

✦ Synopsis

Single crystals of the compound AgTaS 3 have been prepared through reactions of the elements with halide mixtures. The structure of AgTaS 3 has been analyzed by single-crystal X-ray diffraction methods. AgTaS 3 crystallizes in the space group D 17 2h -Cmcm of the orthorhombic system with four formula units in a cell of dimensions a‫,)2(873.3؍‬ b‫,)5(070.41؍‬ c‫)3(657.7؍‬ A > . The structure of AgTaS 3 consists of two-dimensional 2

[TaS ؊ 3 ] layers separated by Ag ؉ cations. The layer is composed of Ta-centered bicapped trigonal prisms stacked on top of each other by sharing triangular faces. These chains are linked to form the infinite two-dimensional 2

[TaS ؊ 3 ] slabs. These layers are held together through van der Waals interactions, and Ag ؉ ions reside in the distorted octahedral sites between the layers. The temperature dependence of the electrical conductivity along the needle axis of AgTaS 3 shows the typical behavior of an extrinsic semiconductor.