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The thermoelectric powers of dilute silver-gold and silver-germanium alloys are determined from 78 to 300°K. Nordheim-Gorter plots are made for these alloy systems at 273 and 295°K, and the characteristic thermopowers Se1 and Se0, due to solute and solvent, respectively, are determined at these temperatures. Calculated values of Se1, for both alloy systems, agree in sign and approximate numerical value with the experimental values. For Ag-Au, small or negligible Fermi-surface changes are indicated up to the maximum gold concentration of 1.5 at.%. The Ag-Ge data, however, deviate from the expected linearity predicted by the Nordheim-Gorter relation at approximately 0.5 at.%. A detailed comparison of the present Ag-Au data with previous results for Cu-Ag and Cu-Au is carried out, using a Nordheim-Gorter type relation for ΔS, the difference in thermopower between the pure metal and alloy.
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