  The hyperfine interactions at the uranium site in the antiferromagnetic USb2
compound were calculated within the density functional theory (DFT) employing
the augmented plane wave plus local orbital (APW+lo) method. We investigated
the dependence of the nuclear quadruple interactions to the magnetic structure
in USb2 compound. The investigation were performed applying the so called band
correlated LDA+U theory self consistently. The self consistent LDA+U
calculations were gradually added to the performed generalized gradient
approximation (GGA) including scalar relativistic spin orbit interactions in a
second variation scheme. The result, which is in agreement with experiment,
shows that the 5f-electrons have the tendency to be hybridized with the
conduction electrons in the ferromagnetic uranium planes.
