Figure 1.

Normalized EXAFS spectra and corresponding radial structural functions for strontium sorbed to amorphous silica and for Sr²⁺(aq), strontianite (SrCO₃(s)), and a Ca/Sr zeolite models. Solid lines are the data and dashed lines are fits to the data. For all sorption samples collected at low temperature, there is only a single shell of oxygen backscatterers indicated by one peak in the radial structural functions compared to multiple peaks for the model compounds reflecting Sr-Sr, Sr-C and Sr-Si/Al backscatters.