Author/Authors :
Mao, Yuanlv State Key Laboratory of High Performance Ceramics and Superfine Microstructure -Shanghai Institute of Ceramics - Chinese Academy of Sciences, People's Republic of China , Fang, Yuqiang State Key Laboratory of High Performance Ceramics and Superfine Microstructure - Shanghai Institute of Ceramics - Chinese Academy of Sciences, People's Republic of China , Wang, Dong State Key Laboratory of High Performance Ceramics and Superfine Microstructure - Shanghai Institute of Ceramics - Chinese Academy of Sciences, People's Republic of China , Bu, Kejun State Key Laboratory of High Performance Ceramics and Superfine Microstructure - Shanghai Institute of Ceramics - Chinese Academy of Sciences, People's Republic of China , Zhao, Wei State Key Laboratory of High Performance Ceramics and Superfine Microstructure - Shanghai Institute of Ceramics - Chinese Academy of Sciences, People's Republic of China , Huang, Fuqiang State Key Laboratory of High Performance Ceramics and Superfine Microstructure - Shanghai Institute of Ceramics - Chinese Academy of Sciences, People's Republic of China
Abstract :
Rb0.21(H2O)yWS2, rubidium hydrate dithiotungstate, is a new quasi two-dimensional sulfide. Its crystal structure consists of ordered WS2 layers, separated by disordered Rb+ ions and water molecules. All atomic sites are located on mirror planes. The WS2 layers are composed of edge-sharing [WS6] octahedra and extend parallel to (001). The presence of structural water was revealed by thermogravimetry, but the position and exact amount could not be determined in the present study. The temperature dependence of the electrical resistance indicates that Rb0.21(H2O)yWS2 is semiconducting between 80–300 K.
Keywords :
crystal structure , quasi two-dimensional structure , disorder , electric properties
