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Figure 1:   Mössbauer spectra for a 4 at.% Sn in Ag alloy at the various indicated temperatures. The solid line is the Lorentzian fit used to obtain the various parameters utilized in the interpretation of the data.

 
Figure 2:   Mössbauer spectra for a 1 at.% Sn in Pb alloy at the various indicated temperatures. The solid line is the Lorentzian fit used to obtain the various parameters utilized in the interpretation of the data.

 
Figure 3:   (a) Plots of vs. T for alloys with 1, 2, 4 at.% Sn (all enriched) and 4 at.% natural Sn in Ag, not corrected for saturation effects. Unless shown, error bars are the same size or smaller than the symbol used. x's show data collected during cooling, while the rest of the points are on heating. The solid lines are fits to experimental data using an anharmonic model. (b) Plots of linewidth vs. T for the same alloys.

 
Figure 4:   (a) Plots of vs. T for alloys with 0.5, 1, 2, and 3 at.% Sn (all enriched) in Pb. x's show data collected during cooling, while the rest of the points are on heating. Unless shown, error bars are the same size or smaller than the symbol used. The solid lines are fits to a harmonic model. The highest temperature point of the 1 at.% Sn curve has an asymmetrical error bar with a lower limit near zero. (b) Plots of linewidth vs. T for the same alloys.

 
Figure 5:   Plot of line shift vs. T for 2, 4, and 8 at.% Sn (enriched) in Ag alloys. The dots are during heating and the x's are during cooling. The vertical scale is displaced downward by 0.05 and 0.10 for the 4 and 2% samples, respectively. The line is a guide to the eye.

 
Figure 6:   Plot of line shift vs. T for 1, and 2 at.% Sn in Pb alloys. The line is a guide to the eye.

 
Figure 7:   The first shell XAFS of the K-edge of Sn in an alloy of 2 at.% Sn in Pb is shown by dots. Calculations with 12 neighbors of Pb at 3.479Å (solid), and with 9 Pb neighbors at 3.479Å and 3 Sn neighbors at 3.479Å (dash) are also shown. Note that the data are inconsistent with the latter model.