Crystal structure and electrical resistance property of Rb(0.21)(H(2)O) (y) WS(2).

Rb(0.21)(H(2)O) (y) WS(2), rubidium hydrate di-thio-tungstate, is a new quasi two-dimensional sulfide. Its crystal structure consists of ordered WS(2) layers, separated by disordered Rb(+) ions and water mol-ecules. All atomic sites are located on mirror planes. The WS(2) layers are composed of edge-sharing [WS(6)] octa-hedra 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 Rb(0.21)(H(2)O) (y) WS(2) is semiconducting between 80-300†K.