  Magnetic moment of the Fe2+ ion in FeBr2 has been calculated to be 4.32 mB in
the magnetically-ordered state at 0 K. It is composed from the spin moment of
3.52 mB and the orbital moment of +0.80 mB. These calculations show that for
the meaningful analysis of e-m properties of FeBr2 the spin-orbit coupling is
essentially important and that the orbital moment is largely unquenched.
