Abstract
The electrical resistivity \ensuremath{\rho} of liquid K-Sn and Cs-Sn alloys has been measured as a function of composition and temperature. The resistivities of both systems exhibit very sharp peaks close to the equiatomic composition. At the same composition, the temperature dependence of the resistivity has a deep minimum. The maximum resistivities are 3100 and 14 200 \ensuremath{\mu}\ensuremath{\Omega} cm, respectively. A comparison with the Li-Sn and Na-Sn alloys and with the alkali-lead systems strongly suggests that Zintl ions are formed in the liquid. Finally the liquidus curve of the K-Sn system was determined resistometrically.
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