In this work the Mössbauer spectroscopy has been used to study the magnetic properties of Fe 2+x Mn 1−x Al alloys with small deviations of composition from the stoichiometric 2:1:1. The Mössbauer parameters obtained for the L2 1 phase indicate H hf fields of about 25 T and 30 T at 80 K for Fe atoms at X sites in the ordered X 2 YZ structure of the L2 1 full Heusler alloys.