RMn(2) compounds (R = Nd, Sm, Ho, Er, Tm and Tn) with the Mn atoms sub
stituted by Fe-57 were studied at 4.2 K. The nonmagnetic character of
Mn in TmMn2 and ErMn2 and the existence of a mixed phase in HoMn2 were
confirmed. The absence of a self-magnetic moment on the Fe-57 probe a
t nonmagnetic Mn sites was found.