Temperature dependence of the electrical resistivity of liquid tin between 214 degrees C and 705 degrees C

The electrical resistivity of liquid tin was measured between 214 degrees C (subcooled state) and 705 degrees C with a relative accuracy of the order of 10 -3 %. The resistivity of liquid Sn was found to be concave (d 2 rho /dT 2 <0) function of the temperature rho (T)=a 1 (t-T FP )+a 2 (1-exp(-a 3 (T-T FP )))+ rho 0 in the whole range studied. The temperature coefficient of resistivity is, contrary to previous results, not a constant but a decreasing and continuous function of the temperature. A possible explanation of the observed behaviour of the resistivity and its temperature coefficient in terms of a two component model of liquid is suggested.