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Analysing the EXAFS of several Mn and Co systems, the absorbing atom phase shift α and backscattering amplitude phase shift β are evaluated. It is shown that the parameters α and β vary linearly with the nearest neighbour distance, R, except in the systems CoCl_{2}·6H_{2}O, MnSO_{4}·H_{2}O and MnF_{2}. The nearest neighbour distance, R, in the complicated systems like smaltite and braunite minerals...
X-ray absorption Ni K-edge spectra are recorded for the following systems: Ni metal, Ni(NO_{3})_{2} • 6H_{2}0, Ni_{3}(PO_{4})_{2} • 6H_{2}0, NiSO_{4} • 6H_{2}0, NiCO_{3}, NiO and La_{2}NiO_{4} using a Cauchois-type bent crystal spectrograph. The chemical shift of these systems is correlated with the partial charge determined using Sanderson's method. On the basis of regression analysis a relation...
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