The homogeneity ranges of the L1(2)-ordered compounds Ni3Ga and Ni3Ge and t
he boundaries of the neighboring phrases have been examined by electron pro
be microanalysis using heterophase alloys in the temperature ranges 1073 to
1373 K (Ni-Ga) and 1073 to 1346 K (Ni-Ge), The composition ranges of the L
1(2)-ordered phases have been found to he narrower than those reported in t
he literature, on the Gab-rich side for Ni3Ga and on the Ge-deficient side
for Ni3Ge.