Measurement of the Resistivity of Cesium at Elevated Temperatures

An experiment is described in which the electrical resistivity of liquid cesium was measured from ambient temperature to 419°C, and experimental values are presented. In the low‐temperature region the data agree quite well with measurements made by others. A linear approximation which best correlates the data from the melting point to 419°C to ±1% is $$\rho {\mathrm{c}}_{\mathrm{s}}\text{=38.5[1+0.00308(T−50)]\hspace{0.17em}μ\hspace{0.17em}}\mathrm{ohm-cm}.$$ Here T is temperature in degrees centigrade. By use of the Widemann‐Franz relation, a thermal conductivity of 0.048 to 0.050 cal/sec‐deg C‐cm is predicted.