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Temperature. -The thermoelectric and structural properties of the title compound are studied below 300 K for samples with x = 0.0, 0.1, 0.2, 0.3, and 0.4. The electrical resistivity is found to increase with increasing Cd content x and to be lower below the β→α phase transition. The Seebeck coefficient also increases with x. The β→α phase transition temperature is almost independent of the Cd content. Although the power factor at 300 K has a maximum of 6·10 -6 Wcm -1 K -2 at x = 0.2, the thermoelectric performance is not improved very much. -(NAKAMOTO*, G.; SOUMA, T.; YAMABA, M.; KURISU, M.; J.