Gd-155 Mossbauer spectra were measured for GdMn2 compound. The main re
sult reported is that the Gd sublattice in GdMn2 is ordered in the tem
perature range 40 K less-than-or-equal-to T less-than-or-equal-to 80 K
. The existence of the shoulders to the main spectrum was proven to be
due to small amount (2.5%) of Gd2O3 oxide in the sample.