Mossbauer spectra of the layer compound Sr, 2Sm3.2Lil >Fe, >04 show significant differences from those of similar compounds, studied previously, where the rare-earth ion was La, Pr or Nd. The Sm spectra are more complicated but can be fitted in an internally consistent way, requiring at least four components. This suggests a significantly greater degree of disorder in the Li/Fe site occupation in the Sm case.