X-ray-diffraction patterns and Mossbauer spectra of Sm-2(Fe,Ga)(17)C-1
.5 alloys have been studied. The results of x-ray-diffraction patterns
and Mossbauer spectra indicate that little alpha-Fe and carbonides ap
pear in Sm-2(Fe,Ga)(17)C-1.5 alloys. The addition of a few Ga atoms sh
ow that the thermal stability in Sm-2(Fe,Ga)(17)C-1.5 alloys is gettin
g better. Structural analyses indicate C atoms as interstitial atoms o
ccupying the 9d site. Ga atoms seem to substitute partially for Fe ato
ms and occupy preferentially the 18h site.