Two additional nuclear resonances of theF19nuclei are observed in the antiferromagnetic state ofNiF2.These resonances can be observed in zero magnetic field at&ngr; = 26.6 Mc/secand&ngr; = −51.2 Mc/sec. They arebroad, asymmetric, and easily saturated, with an apparent value ofT1∼8 sec, at 20.30°K. They correspondto internal fields along [110] and [1¯1¯0] directions respectively forH0along [110]. These compare quite wellwith the theoretical values of +18.7 Mc/sec and −54.4 Mc/sec calculated from the measured interactionparameters for a spin alignment along [110] and [1¯1¯0]. These two resonances arise fromF19nuclei in thedomain walls.