Figure 7

Experimental (solid) V K edge FT(χ(k)*k³) of dehydrated V _x O _y /SBA-15 (10.8 wt %) together with a theoretical XAFS function (i.e. "ordered arrangement of V ₂ O ₇ " model). Fitting results are given in Table 2. Inset shows a schematic representation of arrangement of V₂O₇ units in Mg₂V₂O₇. Also shown are the Fourier transformed χ(k)*k³ of the individual scattering paths together with corresponding coordination number in brackets.