ANISOTROPIC ELECTRONIC-PROPERTIES OF THE BRONZE, CSP8W8O40

Cesium tungsten phosphate oxide, CsP//8W//8O//4//0, bronze single crystals were grown by chemical vapor transport with KBr as the transporting agent. Electrical resistivity measurements on oriented crystals indicate quasi-one-dimensional behavior. A broad transition observed at approximately 160 K may be attributed to order-disorder transition associated with the Cs** plus ions, or a change of the type of conductivity from hopping type (activated) to band type (nonactivated). Qualitative Seebeck measurements of CsP//8W//8O//4//0 indicate p-type behavior at room temperature and n-type behavior at liquid N//2 temperature.