Chemical Shift of X-Ray K-Absorption Edge of Ni in Some of its Compounds and its Correlation with Partial Charge
V.K. Singh, A.R. Chetal
Department of Applied Physics, Indian School of Mines, Dhanbad, India

and P.R. Sarode
Department of Physics, Goa University, Goa, India
Received: September 2, 1994; revised version: December 20, 1994
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X-ray absorption Ni K-edge spectra are recorded for the following sys­tems: Ni metal, Ni(NO3)2 • 6H20, Ni3(PO4)2 • 6H20, NiSO4 • 6H20, NiCO3, NiO and La2NiO4 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 ΔE = A0 + A1q + A2q2 -A3q3 + A4q4 between the chemical shift, ΔE, and the partial charge, q, has been suggested. The discrepancy in the shift of NiO and La2NiO4 has also been discussed.
DOI: 10.12693/APhysPolA.87.1003
PACS numbers: 78.70.Dm