Abstract
The nickel Kα spectra of oxides, halides (NiF2, K2NiF6, NiCl2, NiBr2), complex compounds, and metal are measured with two different double-crystal X-ray fluorescence spectrometers. The peak shifts and line width changes due to the changes in the chemical states are reported. High reproducibility has been shown for the chemical shift and line width measurements. The DV-Xα molecular orbital calculation at the ground and the 1s-1 hole states was performed to prove that the chemical effect originats from the charge-transfer mechanism.
